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Class 9 Biology Assignments

We have provided below free printable Class 9 Biology Assignments for Download in PDF. The Assignments have been designed based on the latest NCERT Book for Class 9 Biology . These Assignments for Grade 9 Biology cover all important topics which can come in your standard 9 tests and examinations. Free printable Assignments for CBSE Class 9 Biology , school and class assignments, and practice test papers have been designed by our highly experienced class 9 faculty. You can free download CBSE NCERT printable Assignments for Biology Class 9 with solutions and answers. All Assignments and test sheets have been prepared by expert teachers as per the latest Syllabus in Biology Class 9. Students can click on the links below and download all Pdf Assignments for Biology class 9 for free. All latest Kendriya Vidyalaya Class 9 Biology Assignments with Answers and test papers are given below.

Biology Class 9 Assignments Pdf Download

We have provided below the biggest collection of free CBSE NCERT KVS Assignments for Class 9 Biology . Students and teachers can download and save all free Biology assignments in Pdf for grade 9th. Our expert faculty have covered Class 9 important questions and answers for Biology as per the latest syllabus for the current academic year. All test papers and question banks for Class 9 Biology and CBSE Assignments for Biology Class 9 will be really helpful for standard 9th students to prepare for the class tests and school examinations. Class 9th students can easily free download in Pdf all printable practice worksheets given below.

Topicwise Assignments for Class 9 Biology Download in Pdf

Class 9 Biology Assignments

Advantages of Class 9 Biology Assignments

  • As we have the best and largest collection of Biology assignments for Grade 9, you will be able to easily get full list of solved important questions which can come in your examinations.
  • Students will be able to go through all important and critical topics given in your CBSE Biology textbooks for Class 9 .
  • All Biology assignments for Class 9 have been designed with answers. Students should solve them yourself and then compare with the solutions provided by us.
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Frequently Asked Questions by Class 9 Biology students

At https://www.cbsencertsolutions.com, we have provided the biggest database of free assignments for Biology Class 9 which you can download in Pdf

We provide here Standard 9 Biology chapter-wise assignments which can be easily downloaded in Pdf format for free.

You can click on the links above and get assignments for Biology in Grade 9, all topic-wise question banks with solutions have been provided here. You can click on the links to download in Pdf.

We have provided here topic-wise Biology Grade 9 question banks, revision notes and questions for all difficult topics, and other study material.

We have provided the best collection of question bank and practice tests for Class 9 for all subjects. You can download them all and use them offline without the internet.

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NCERT Solutions for Class 9 Biology Free PDF Download

Ncert solutions for class 9 biology.

NCERT is on the priority list of recommendation of the Central Board of Secondary Education (CBSE). Here, you will find all the chapter-wise NCERT Solutions for Class 9 Biology. It will help you to understand the subject and perform well in exams.

Biology along with having a good weight in exams is equally important from experiment and practical point of view. In order to understand the chapters in biology, NCERT solutions play an important role. Here, on Toppr.com, you will find high quality of NCERT solutions prepared by a special team of experts. Moreover, the team is available to clear your doubts.

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NCERT Solutions for Class 9 Biology

NCERT Solutions for Class 9 Biology Chapterwise

Class 9 Biology Chapter 1 Fundamental Units of Life

Class 9 Biology Chapter 2 Improvement in Food Resources

Class 9 Biology Chapter 3 Diversity in Living Organisms

Class 9 Biology Chapter 4 Why do we fall ill?

Class 9 Biology Chapter 5 Natural Resources

Class 9 Biology Chapter 6 Tissues

Class 9 Biology NCERT Solutions Chapterwise

Ncert solutions for class 9 biology chapter 1 fundamental units of life.

Robert Hooke was the first person to prepare a microscope and see a cell. A cell is the basic fundamental unit of life. In this chapter, students will learn the structures and functions of different cells. Moreover, the effect of hypotonic, isotonic, and hypertonic solutions on a cell. Download NCERT Solutions for  Fundamental Units of Life here .

NCERT Solutions for Class 9 Biology Chapter 2 Tissues

This chapter helps the students to learn about the various types of Tissues in Plants like Merismatic Tissue and Permanent tissue. Moreover, in the end, the chapter highlights topics like Position of plant tissues, a section of a stem, guard cells, etc. Download NCERT Solutions for Tissues here .

NCERT Solutions for Class 9 Biology Chapter 3 Diversity in Living Organisms

There are various life forms on this planet and it becomes very essential to study all of them. In chapter helps students to know about the various groups of organisms. Aristotle has done the classification of animals on the basis of land, air, and water, etc. There are certain terms related to the classification which the students will confront are Kingdom, Phylum, Class, Order, Family, Genus, Species, etc. Download NCERT Solutions for Diversity in Living Organisms here .

NCERT Solutions for Class 9 Biology Chapter 4 Why do we fall ill?

Health and Diseases are the two most important topics of discussion in this present world. This chapter highlights Health and its significance, reasons why do we fall ill, etc. Along with this, this chapter discusses the distinction between a healthy person and disease-free person. Download NCERT Solutions for Why do we fall ill here .

NCERT Solutions for Class 9 Biology Chapter 5 Natural Resources

This chapter highlights the most important element of life: Air. Starting with the role of the atmosphere in climatic control, this chapter deals with topics like how air moves, winds, rain, and air pollution. While discussing the topic of Air pollution, the chapter states various pollutants of the same. Moreover, in the end, the chapter, states various solutions to the problem. Download NCERT Solutions for Natural Resources here .

NCERT Solutions for Class 9 Biology Chapter 6 Improvement in Food Resources

This chapter deals with concepts like Crop Yield. Along with that, the chapter discusses the improvement in Crop Yield and related topics. Improvement in livestock and food crops are also discussed. The chapter also discusses topics like the ways to improve crop yield, crop production improvement, etc. Download NCERT Solutions for Improvement in Food Resources here .

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Solved Questions For You:

Question 1. A baby is not able to tell her/his caretakers that she/he is sick. What would help us to find out?

(a) That the baby is sick? (b) What is the sickness?

Question 2. Under which of the following conditions is a person most likely to fall sick?

(a) When she is recovering from malaria. (b) When she has recovered from malaria and is taking care of someone suffering from chicken-pox. (c) When she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox. Why?

Answer: A person is more likely to fall sick when she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chickenpox. This is because since she has suffered from malaria and is in the recovery phase, it means that she is still not completely diseases-free. Fasting affects the immune system as the body is deprived of essential nutrients required to maintain a healthy body. Chickenpox is a contagious disease, this also makes her susceptible to contracting the disease while taking care of a person suffering from chickenpox.

Question 3. A doctor/nurse/health-worker is exposed to more sick people than others in the community. Find out how she/he avoids getting sick herself/himself.

Answer:  Medical personnel are constantly in contact with the sick and diseased people coming in the hospitals for the treatment. They follow various measures in order to prevent themselves from getting infected:

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Assignments Class 9 Biology Pdf Download

Students can refer to Assignments for Class 9 Biology available for download in Pdf. We have given below links to subject-wise free printable Assignments for Biology Class 9 which you can download easily. All assignments have a collection of questions and answers designed for all topics given in your latest NCERT Books for Class 9 Biology for the current academic session. All Assignments for Biology Grade 9 have been designed by expert faculty members and have been designed based on the type of questions asked in standard 9 class tests and exams. All Free printable Assignments for NCERT CBSE Class 9, practice worksheets, and question banks have been designed to help you understand all concepts properly. Practicing questions given in CBSE NCERT printable assignments for Class 9 with solutions and answers will help you to further improve your understanding. Our faculty have used the latest syllabus for Class 9. You can click on the links below to download all Pdf assignments for class 9 for free. You can get the best collection of Kendriya Vidyalaya Class 9 Biology assignments and questions workbooks below.

Class 9 Biology Assignments Pdf Download

CBSE NCERT KVS Assignments for Biology Class 9 have been provided below covering all chapters given in your CBSE NCERT books. We have provided below a good collection of assignments in Pdf for Biology standard 9th covering Class 9 questions and answers for Biology. These practice test papers and workbooks with question banks for Class 9 Biology Pdf Download and free CBSE Assignments for Class 9 are really beneficial for you and will support in preparing for class tests and exams. Standard 9th students can download in Pdf by clicking on the links below.

Subjectwise Assignments for Class 9 Biology

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Benefits of Solving Class 9 Biology Assignments

  • The best collection of Grade 9 assignments for Biology have been provided below which will help you in getting better marks in class tests and exams.
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  • We have provided single click download links to all chapterwise worksheets and assignments in Pdf.
  • Class 9 practice question banks will support to enhance subject knowledge and therefore help to get better marks in exam

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  • NCERT Solutions for Class 9 Science Chapter 5 - The Fundamental Unit Of Life
  • NCERT Solutions

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NCERT Solutions for Class 9 Science Chapter 5 - The Fundamental Unit of Life

Chapter 5 Science Class 9 is a fundamental chapter in Biology that describes the types and significant characteristics of a cell, the unit of life. The chapter also covers important topics about the structure of a cell, plasma membrane, nucleus, DNA, and chromatin material which plays a major role in the functioning of the cell of any living organism. The NCERT Solution for Class 9 Chapter 5 provides detailed answers to help students understand the topics covered in the chapter. The answers in the NCERT Solutions Class 9 Chapter 5 are explained with diagrams that provide a comprehensive understanding of the chapter. Maths Students who are looking for better solutions ,They can download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.

List of Important Topics Covered in NCERT Solutions for Class 9 Science Chapter 5

Ncert class 9 science chapter 5 explains the following topics in detail. .

1.1  What are living organisms made up of? 

1.2  What are these structures?

1.3  What is the cell made up of? What is the structural organisation of a cell?

Plasma membrane or cell membrane

Mitochondria

Endoplasmic reticulum

Vacuoles 

A Glance About The Topic  

Every living organism in the world is made up of cells. The shape and organs in the cell may differ from plants and animals. 

Organisms are majorly classified into two types based on the count of cells, they are unicellular and multicellular organisms. 

In 1665, Robert hook was the first person to discover the cell

A cell has certain components to perform specific tasks inside the cell, they are called organelles 

The organelles of a cell are protected by a membrane called a cell wall. Cell walls also takes responsibility for cell respiration. 

Mitochondria is a powerhouse of the cell

Cytoplasm is the fluid content present inside the cell 

This chapter explains all the organelles which are present inside the cell and functions of each organelle in detail.

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Access NCERT Solutions for Class 9 Science Chapter 5 - The Fundamental Unit of Life

1. Who discovered cells and how?

Ans: The dead cells were first discovered by Robert Hooke in 1665. He observed in cork cells that the cells are like honeycomb structures with the help of a basic microscope while the living cells were first discovered by Antoine van Leuwenhoek after the discovery of the electron microscope.

2. Why is the cell called the structural and functional unit of life?

Ans: Cell is the basic unit of life and is present in all living organisms. Each living cell performs its specific functions that are the characteristics of all living forms. The cell consists of various cell organelles which help the cell to live and perform all its functions. The various cell organelles perform their special function that includes making new material in the cell, removal of the waste material from the cell and so on. Thus, cells are called basic structural and functional units of life as they perform all these functions.

3. How do substances like $\mathbf{CO_2}$ and water move in and out of the cell? Discuss.

Ans: By the process of diffusion the substances like carbon dioxide and water move in and out of a cell from the region of high concentration to the region of low concentration. When the concentration of carbon dioxide and water is higher outside the cell than carbon dioxide and water moves inside the cell and when the concentration of carbon dioxide and water is lower outside the cell and is higher inside the cell then they move out of the cell.

4. Why is the plasma membrane called a selectively permeable membrane?

Ans: The plasma membrane or the cell membrane is known as a selectively permeable or semipermeable membrane because it is responsible for the regulation of the various substances in and out of the cell. This results in the entry of certain substances and inhibits the entry of other substances through the plasma membrane.

5. Fill in the gaps in the following table illustrating differences between prokaryotic and eukaryotic cells.

6. Can you name the two organelles we have studied that contain their own genetic material?

Ans: The two organelles we have studied that contain their own genetic material are mitochondria and plastids. Mitochondria help in respiration in the cell while plastids are responsible for the process of photosynthesis in leaves.

7. If the organization of a cell is destroyed due to some physical or chemical influence, what will happen?

Ans: If the organization of a cell is destroyed due to some physical or chemical influence then the cell will not be able to perform many basic functions like photosynthesis, respiration, nutrition, etc., and may also result in the stopping of all life activities in the cell. Due to the cell damage, the lysosome bursts, and their enzymes digest such cells.

8. Why are lysosomes known as suicide bags?

Ans: Lysosomes are the cell organelles that are vesicular structures and contain the digestive enzymes. The function of these enzymes inside the lysosomes is to break down any foreign body that enters the cell. Sometimes, the lysosome may also act suicidal by releasing the digestive enzymes inside the cell and leads to self-destruction. Thus lysosomes are known as suicidal bags.

9. Where are proteins synthesized inside the cell?

Ans: Proteins are the building blocks of the body that are made up of various amino acids. They are synthesized inside the ribosomes that are the small structures present in the cytoplasm or might be attached to the surface of the endoplasmic reticulum. The endoplasmic reticulum is called the rough endoplasmic reticulum due to the presence of ribosomes on its surface. 

10. Make a comparison and write down ways in which plant cells are different from animal cells.

Ans: The difference between the plant cells and the animal cells are:

11. How is a prokaryotic cell different from a eukaryotic cell?

Ans: The difference between a prokaryotic cell and a eukaryotic cell are:

12. What would happen if the plasma membrane ruptures or breaks down?

Ans: The function of the plasma membrane is to act as a semipermeable membrane and regulate the entry and exit of the various substances in and out of the cell by the process of diffusion or osmosis and if the plasma breaks or ruptures then the contents of the cell might leak. This will result in the cells getting less nutrition than required.

13. What would happen to the life of a cell if there was no Golgi apparatus?

Ans: The function of the Golgi apparatus is packaging and transferring substances from one part of the cell to another. If the Golgi apparatus is absent in a cell then packaging of the proteins or the arrangement of the structural protein will not take place inside a cell. Proteins are essential for cells to perform various metabolic functions and if the proteins fail to reach the cell then this metabolism in the cell will not take place and eventually this will cause the cell to die.

14. Which organelle is known as the powerhouse of the cell? Why?

Ans: Mitochondria are known as the powerhouse of the cell as they produce the energy which is required by the cell to perform various functions. The energy which is released by the mitochondria is in the form of ATP molecules and is required for various chemical activities needed for. The energy stored in ATP is used by the body to make new chemical compounds and to perform mechanical work. Thus, mitochondria are known as the powerhouse of cells.

15. Where do the lipids and proteins constituting the cell membrane get synthesized?

Ans: Lipids and proteins are the essential part of the plasma membrane which is synthesized through the endoplasmic reticulum. The endoplasmic reticulum is found to be of two types based on the substances they synthesize. The smooth endoplasmic reticulum is responsible for the synthesis of lipids while the rough endoplasmic reticulum is responsible for the synthesis of proteins.

16. How does an Amoeba obtain its food?

Ans: Amoeba contains pseudopodia which are responsible for engulfing as well as removing food. The process by which amoeba acquires their food is called endocytosis. The plasma membrane of the amoeba is quite flexible thus enabling the cell to engulf the food particles and other materials from its external environment and also excrete the waste outside through the process called exocytosis.

Nutrition in Amoeba

17. What is osmosis?

Ans: The process of movement of water molecules from a region of high water concentration to a region of low water concentration through a selectively permeable membrane is called osmosis. This process continues until the solute concentration reaches equilibrium. The movement of water takes place across a concentration gradient to maintain equity on both sides of the cell.

18. Carry out the following osmosis experiment:

Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,

Keep cup A empty

Put one teaspoon sugar in cup B

Put one teaspoon salt in cup C

Put one teaspoon of sugar in the boiled potato cup D.

Keep these for two hours. Then observe the four potato cups and Solution the following:

(i) Explain why water gathers in the hollowed portion of B and C.

(ii) Why is potato A necessary for this experiment?

(iii) Explain why water does not gather in the hollowed-out portions of A and D.

Ans: The Solutions Are as Follows:

(i) The concentration of water that surrounds the potato is found to be more than inside which results in the flow of water inside the potato by the process of osmosis. Thus, the water gathers in the hollowed portions of setup B and C.

(ii) Potato A in this experiment is necessary since it is kept as a control set-up that helps in comparing the changes that have taken place in the other two setups of the experiment. By this, we can easily detect the changes in the different setups.

(iii) Since there is no change in the concentration of water in cup A so the water will not gather in the hollowed-out portions while in the case of cup D, due to boiling plasmolysis has taken place which leads to the absence of osmosis thus here also the water will not gather in the hollowed-out portions.

NCERT Solutions For Class 9 Science Chapter 5 The Fundamental Unit of Life - Free PDF Download

Reliable NCERT Solutions for the Fundamental Unit of Life Class 9 PDF is available on Vedantu. Students can download this PDF of NCERT Solutions for free of cost. These NCERT Solutions are prepared by the subject-matter experts at Vedantu who offer detailed explanation and analysis of every topic and exercises which are framed strictly adhering to the updated CBSE syllabus. Hence by following the NCERT Solution for Class 9 Chapter 5, students will be able to learn and understand the crucial concepts covered in the chapter.

Fundamental Unit of Life Class 9 NCERT Solutions

Listed below are some examples of NCERT Solution of Class 9 th Science Chapter 5 which helps students to learn and get greater insights into the concepts.

NCERT Solutions for Class 9 Science All Chapters

Chapter 1 - Matter in Our Surroundings

Chapter 2 - Is Matter Around us Pure

Chapter 3 - Atoms and Molecules

Chapter 4 - Structure of Atom

Chapter 6 - Tissues

Chapter 7 - Diversity in Living Organisms

Chapter 8 - Motion

Chapter 9 - Force and Laws of Motion

Chapter 10 - Gravitation

Chapter 11 - Work and Energy

Chapter 12 - Sound

Chapter 13 - Why do We Fall ill

Chapter 14 - Natural Resources 

Chapter 15 - Improvement in Food Resources

NCERT Solution of Class 9 th Science Chapter 5: Solution 1 &2

The first two answers in this PDF will help students to get a detailed understanding of basic concepts like how the cell was developed by Robert Hooke. Furthermore, it also elaborately briefs on why is the cell called the functional and structural unit of life. By learning these two answers students will be able to easily answer the MCQ questions.

Class 9 Fundamental Unit of Life: Solution 3 & 4.

NCERT Class 9 fundamental unit of answer 3 describes the scientific process of diffusion and osmosis that helps substances like carbon dioxide and water to move in and out of the cell, respectively. In this solution, both the processes are discussed in detail so that students can grasp the concepts better.

Similarly, NCERT Solution for Class 9 Chapter 5  solution 4 discusses the plasma membrane and the reason as to why it is selectively permeable. It helps to understand the basics of the chapter in greater depth.

NCERT Solution Class 9 Science Chapter 5: Solution 5

Ch 5 science class 9 Chapter 5 solution number 5 explains the difference between Prokaryotic cell and Eukaryotic cell. Each difference is elaborated in a pointwise manner with respect to size, the position of nucleus, number of chromosomes, and membrane. By going through this solution, a student can distinctly understand the structural and functional differences between the two types of cells.

Marks Weightage of Chapter 5 Science Class 9

Chapter 5 is covered in “Organization in the living world” which is unit 2 of the Class 9 Science syllabus. This unit comprises a considerable weightage of 26 marks out of 80. 

In this regard, students should minutely focus on studying the intricacies of this chapter so that they can attempt all short and long answer questions properly during their exams.

Benefits of NCERT Solution for Class 9 Chapter 5 PDF 

There are several ways in which the PDF of Class 9 Fundamental Unit of Life NCERT Solutions are beneficial.

Detailed solution for long answer type questions

Elaborate examples and relevant diagrams

Solved exercises to learn MCQs better

Curated by expert science teachers

Updated to the latest CBSE syllabus

All these factors ensure that students can adequately understand each topic in detail and therefore have a better learning experience.

The NCERT Solutions of Chapter 5 for Class 9 Science are well-curated with all the important questions from the point of view of the CBSE exam. The students are required to understand the type of questions being asked in the CBSE exam, for which they have to priorly study from these NCERT solutions. 

Summary 

The NCERT Solutions for Class 9 Science Chapter 5 - "The Fundamental Unit of Life" provide a comprehensive understanding of the chapter's content. This chapter focuses on the fundamental unit of life, which is the cell. The NCERT Solutions offer detailed explanations, diagrams, and examples to help students grasp the concepts effectively.

The solutions cover various topics related to cells, including the discovery of cells, the structure and functions of different cell organelles, and the differences between plant and animal cells. They also provide answers to the questions and exercises given at the end of the chapter, aiding students in their exam preparation.

By studying these solutions, students can gain a deeper insight into the structure and functions of cells, understand the importance of cells in living organisms, and appreciate the complexity of cellular organization. The solutions also promote critical thinking and scientific inquiry by encouraging students to explore the diverse aspects of cell biology. 

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FAQs on NCERT Solutions for Class 9 Science Chapter 5 - The Fundamental Unit Of Life

1. What is meant by Osmosis and Diffusion as per the NCERT Solutions?

Osmosis is a process through which water moves in and out of the cell membrane. The movement is always from a region of higher concentration to lower concentration of water through a selectively permeable membrane until it reaches an equilibrium.

In a similar manner, diffusion refers to the process by which Carbon Dioxide moves in and out of the cell membrane. The cellular wall contains a high level of CO 2 , whereas the CO 2 concentration outside is significantly low. This causes the CO 2 to move from a region of higher concentration to that of low concentration to maintain a level of equilibrium.

2. What are the important topics in the Fundamental Unit of Life as per the NCERT Solutions?

The important topics that students must learn in the chapter fundamental unit of life are – Discovery of the cell, Unicellular organism, Multi-cellular organism, characteristics of the cell, structural organization of cell-like plasma membrane, nucleus, and cytoplasm, DNA, Chromatin material, Chromosomes, and proteins.

Apart from this, students must also focus on topics like Mitochondria, Plastids, lysosomes, chloroplast, leucoplast, vacuoles, Golgi apparatus, Ribosomes, Endoplasmic reticulum, and Cell organelles. Students should focus on learning the topics extensively. Diagrams of every structure and its parts should be learned in detail to answer MCQ, long answer and questions based on diagrams.

3. What is the difference between Prokaryotic and Eukaryotic cells as per the NCERT Solutions?

There are four main differences between Prokaryotic and Eukaryotic cells, which are largely related to their structures and size.

Prokaryotic cells are smaller in size, but Eukaryotic cells are bigger in general. The nucleoid is the nuclear portion of a prokaryotic cell that lacks a nuclear membrane. In comparison, the nuclear membrane of a Eukaryotic cell is strongly defined. Prokaryotic cells have a single chromosome, whereas Eukaryotic cells have many chromosomes. Membrane-bound cell organelles are not found in prokaryotic cells, but they are present in eukaryotic cells.

4. How many questions are present under each exercise of the NCERT Solutions for Class 9 Science Chapter 5?

In the NCERT answers for Class 9 Science Chapter 5, each practice has 4 to 7 problems. All of the questions have thorough answers. Samples from the textbook are also addressed. If possible, the solutions are described in detail using tables and diagrams. All expert-designed answers are presented in a simplified format to ensure that students grasp the idea quickly. If you're seeking high-quality solutions, check out Vedantu's NCERT solutions for Class 9 Science Chapter 5.

5. How are the NCERT Solutions for Class 9 Science Chapter 5 designed in Vedantu?

All answers from the NCERT book are answered by Vedantu. Vedantu makes learning and memorising answers easier by making the answers interactive with the help of tables and diagrams. The diagrams are also labeled to help the students memorise easily. All questions are answered with the help of professionals. You can download these solutions free of cost. You can download them, save them on your computer and refer to them anytime while preparing for exams. 

6. Why is the cell the basic unit of life according as per the NCERT Solutions?

A cell is the basic unit of life as it is the unit that forms anything in our body. They form the tissues that further form the organs and different systems in our body. Tissues help in the functioning of these systems and processes like digestion, respiration, etc. in our bodies. This is why cells are referred to as the structural and fundamental units of life.

7. Who discovered the cell and how, according to as per the NCERT Solutions?

Robert Hooke, in 1665, discovered the cell. He was examining a thin slice of cork through a microscope when he observed its honeycomb-like structure. It seemed to comprise mini compartment-like structures. These structures were then called cells. To study more and learn through diagrams students can refer to vedantu website or the app.

8. Can NCERT Solutions help you in the overall preparation for Class 9 Science Chapter 5 for the exam?

Yes, NCERT Answers for Class 9 Science Chapter 5 introduces students to crucial subjects and foundations that students must be familiar with in order to succeed in later courses. Students should thoroughly review what they have learned in school and take regular notes. Taking notes will help students learn and remember the material. Try to practise all of the questions in the NCERT textbook, as well as the supplementary problems in the NCERT Answers PDF, which is available online at the Vedantu website. The PDF will also allow you to modify more quickly.

NCERT Solutions for Class 9 Science

Ncert solutions for class 9.

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CBSE Worksheets for Class 9 Biology

CBSE Worksheets for Class 9 Biology: One of the best teaching strategies employed in most classrooms today is Worksheets. CBSE Class 9 Biology Worksheet for students has been used by teachers & students to develop logical, lingual, analytical, and problem-solving capabilities. So in order to help you with that, we at WorksheetsBuddy have come up with Kendriya Vidyalaya Class 9 Biology Worksheets for the students of Class 9. All our CBSE NCERT Class 9 Biology practice worksheets are designed for helping students to understand various topics, practice skills and improve their subject knowledge which in turn helps students to improve their academic performance. These chapter wise test papers for Class 9 Biology will be useful to test your conceptual understanding.

Board: Central Board of Secondary Education(www.cbse.nic.in) Subject: Class 9 Biology Number of Worksheets: 39

CBSE Class 9 Biology Worksheets PDF

All the CBSE Worksheets for Class 9 Biology provided in this page are provided for free which can be downloaded by students, teachers as well as by parents. We have covered all the Class 9 Biology important questions and answers in the worksheets which are included in CBSE NCERT Syllabus. Just click on the following link and download the CBSE Class 9 Biology Worksheet. CBSE Worksheets for Class 9 Biology can also use like assignments for Class 9 Biology students.

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  • CBSE Worksheets for Class 9 Biology Natural Resources Assignment 2
  • CBSE Worksheets for Class 9 Biology Question Bank Assignment 
  • CBSE Worksheets for Class 9 Biology SA1 Worksheet Assignment 
  • CBSE Worksheets for Class 9 Biology The Fundamental Unit of Life Assignment 1 
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  • CBSE Worksheets for Class 9 Biology Whittaker’s Five Kingdoms Assignment
  • CBSE Worksheets for Class 9 Biology Why Do We Fall Ill Assignment 1
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Advantages of CBSE Class 9 Biology Worksheets

  • By practising NCERT CBSE Class 9 Biology Worksheet , students can improve their problem solving skills.
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Worksheets of CBSE Class 9 Biology are devised by experts of WorksheetsBuddy experts who have great experience and expertise in teaching Maths. So practising these worksheets will promote students problem-solving skills and subject knowledge in an interactive method. Students can also download CBSE Class 9 Biology Chapter wise question bank pdf and access it anytime, anywhere for free. Browse further to download free CBSE Class 9 Biology Worksheets PDF .

Now that you are provided all the necessary information regarding CBSE Class 9 Biology Worksheet and we hope this detailed article is helpful. So Students who are preparing for the exams must need to have great solving skills. And in order to have these skills, one must practice enough of Class 9 Biology revision worksheets . And more importantly, students should need to follow through the worksheets after completing their syllabus.  Working on CBSE Class 9 Biology Worksheets will be a great help to secure good marks in the examination. So start working on Class 9 Biology Worksheets to secure good score.

CBSE Worksheets For Class 9

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  • School Guide
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  • CBSE Class 9 Biology Syllabus 2023-2024 (New Curriculum)

CBSE Class 9 Biology Chapter-Wise Notes

The fundamental unit of life.

  • CBSE Class 9 Notes Science Chapter 5 - The Fundamental Unit of Life
  • What are Living Organisms Made Up of?
  • Plasma Membrane - Definition, Structure, Components, Functions
  • Nucleus: Structure and Function
  • Cytoplasm - Structure and Function
  • Endoplasmic Reticulum - Structure, Types And Functions
  • Golgi Apparatus
  • Lysosomes - Definition, Types, Significance, Functions
  • Mitochondria
  • What are Plastids? - Class 9 Biology
  • Cell Division: Mitosis & Meiosis, Different Phases of Cell Cycle
  • Tissues Class 9 Notes CBSE Science Chapter 6
  • Are Plants and Animals Made of Same Types of Tissues?
  • Meristematic Tissues - Definition, Features, Types, Role
  • Permanent Tissues - Diagram, Types Notes Biology Class 9
  • Structure and Types of Animal Tissues
  • Epithelial Tissue - Introduction, Characteristics, Types, Importance
  • Overview and Types of Connective Tissue
  • Muscular Tissue
  • Nervous Tissue - Definition, Characteristics, Functions, Types

Improvement in Food Resources

  • NCERT Notes for Class 9 Science Chapter 12: Improvement in Food Resources
  • Improvement in Crop Yields
  • Crop Variety Improvement
  • Crop Production and Management
  • Nutrient Management
  • What is Manure? Definition, Types, Advantages and Disadvantages
  • What is Fertilizer? - Example, Definition, Types, and Uses
  • Irrigation: Meaning, Types, Methods and Importance
  • Cropping Patterns
  • Storage of Grains - Overview, Importance, Affecting Factors
  • What is Animal Husbandry? Definition, Types, Role in Agriculture
  • Poultry Farming
  • Inland Fisheries - Overview and Examples
  • Apiculture or BeeKeeping
  • NCERT Solutions for Class 9 Biology
  • NCERT Solutions for Class 9 Science Chapter 5 - The Fundamental Unit Of Life
  • NCERT Solutions For Class 9 Science Chapter 6 Tissues
  • NCERT Solutions for Class 9 Science Chapter 12 Improvement in Food Resources

CBSE Class 9 Chapter-wise Notes  of  Biology  are useful for students to quickly revise important topics for their board examination. Class 10 Biology is an exciting subject that covers a different range of topics such as The fundamental Unit of Life, Tissues, and Improvement in Food Resources

NCERT Notes Class 9 Biology  is important to quickly revise every topic before the examination. Students of Class 9 also be able to find a proper note for their assignment from these biology notes. Revising  Class 9 Biology Notes  can save you time during your stressful examinations and by using this you can make the most out of it. These  CBSE Class 9 Biology  chapter-wise notes cover all important topics and related diagrams that are required for the preparation of the board examination. Studying thoroughly important topics also helps you in future higher studies or any competitive exams.

CBSE Class 9 Biology Notes For All Chapters

CBSE Class 9 Biology  provides a comprehensive understanding of the material that is covered in Class 9. It helps the student build a strong base of knowledge and understanding of Biology. These Biology Notes are written by experts in their own separate disciplines. Notes on  Biology for Grade 9  are made to help students review the material before the exams which helps them to get quick revision. Biology is a subject that has strongly related opinions to other subjects. These biology notes are helpful for revision. As we know, performing well in board exams is important, and studying only  Class 9  textbooks is not enough, so to help you, we made  CBSE Class 9 Biology  notes that will help you get all the compiled topics and chapters in one place.

These chapters and their topics are aimed to clarify all the concepts. You should also practice  NCERT Solutions  and  Previous Year Sample Paper  in order to perform well in your exams.

FAQs on CBSE Class 9 Biology Notes Chapter-Wise

1.  are these class 9 chapter-wise biology notes suitable for self-study.

Answer:  Yes, these Notes have been prepared according to the Class 9  Biology textbook. These solutions provide comprehensive explanations and step-by-step solutions to the questions and exercises given in the textbook.

2. Are Class 9 Biology Notes Chapter-Wise enough for board exams?

Answer:  Class 10 Biology Notes Chapter-Wise helps to provide a better understanding of board examinations, but students may also need to have their studies with more resources that are available to practice. It is also important to consult with your mentors to determine the best plan to study so that it will help you to get good marks accordingly.

3. Why Solving Sample Papers is Important for Exam Preparation?

Answer:  Solving the previous year’s question paper will help you to get a hold on how to frame answers. It also helps in time management and gives an idea about questions type.

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  • Chapter 5: Fundamental Unit Of Life

NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit Of Life

Ncert solutions class 9 science chapter 5 – cbse download free pdf.

Students can learn everything they need to know about the cell with NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life . These solutions are carefully crafted by highly qualified teachers who are experts in their respective fields. Furthermore, we ensure that appropriate content on  NCERT Solutions of Class 9 Science is regularly updated as prescribed by the CBSE board. Besides, we also provide a complete breakdown of the questions, detailing all the steps and processes in an easy-to-understand format.

Download Exclusively Curated Chapter Notes for Class 9 Science Chapter – 5 The Fundamental Unit Of Life

Download most important questions for class 9 science chapter – 5 the fundamental unit of life.

Additionally, we ensure that the NCERT Solutions Class 9 we provide are tailored to meet multiple criteria for the purpose of awarding marks. This ensures that the answers are relevant and retain their informational quotient. Access this chapter’s NCERT Solutions for Class 9 Science in PDF from the link given below.

  • Chapter 1 Matter in Our Surroundings
  • Chapter 2 Is Matter Around Us Pure
  • Chapter 3 Atoms and Molecules
  • Chapter 4 Structure of the Atom
  • Chapter 6 Tissues
  • Chapter 7 Diversity in Living Organisms
  • Chapter 8 Motion
  • Chapter 9 Force and Laws of Motion
  • Chapter 10 Gravitation
  • Chapter 11 Work and Energy
  • Chapter 12 Sound
  • Chapter 13 Why Do We Fall Ill
  • Chapter 14 Natural Resources
  • Chapter 15 Improvement in Food Resources

NCERT Solutions for Class 9 Science Chapter 5 – The Fundamental Unit of Life

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ncert solutions for class 9 march 28 science chapter 5 the fundamental unit of life 1

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Access answers to NCERT Class 9 Science Chapter 5 – The Fundamental Unit of Life (All in-text and exercise questions solved)

Exercise-5.1 page: 59.

1. Who discovered cells, and how?

In 1665, Robert Hooke discovered cells while examining a thin slice of cork through a self-designed microscope. He observed that the cork resembled the structure of a honeycomb consisting of numerous tiny compartments. The minuscule boxes are referred to as cells.

2. Why is the cell called the structural and functional unit of life?

Cells form the structure of an entity. A group of cells form a tissue, further an organ and ultimately an organ system. They perform fundamental functions and life processes such as respiration, digestion, excretion etc., in both unicellular and multicellular entities. They perform all the activities independently. Hence, cells are referred to as structural and fundamental units of life.

Exercise-5.2.1 Page: 61

3. How do substances like CO 2 and water move in and out of the cell? Discuss.

CO 2 moves by diffusion. The cellular waste accumulates in high concentrations in the cell, whereas the concentration of CO 2 in the external surroundings is comparatively lower. This difference in the concentration level inside and outside of the cell causes the CO 2 to diffuse from a region of higher (within the cell) to a lower concentration.

H 2 O diffuses by osmosis through the cell membrane. It moves from a region of higher concentration to a lower concentrated region through a selectively permeable membrane until equilibrium is reached.

4. Why is the plasma membrane called a selectively permeable membrane?

The plasma membrane is called as a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. Not all molecules are free to diffuse.

Exercise-5.2.2-5.2.4 Page: 63

5. Fill in the gaps in the following table, illustrating the differences between prokaryotic and eukaryotic cells.

Exercise-5.2.5 Page: 65

6. Can you name the two organelles we have studied that contain their own genetic material?

The two organelles which have their own genetic material are

1. Mitochondria

2. Plastids

7. If the organisation of a cell is destroyed due to some physical or chemical influence, what will happen?

In the event of any damage to cells and when the revival of cells is not possible, Lysosomes burst, and enzymes digest such cells. This is why lysosomes are often referred to as ‘suicide bags’.

8. Why are lysosomes known as suicide bags?

When there is damage to the cell and when revival is not possible, lysosomes may burst, and the enzymes digest their own cell. Consequently, lysosomes are known as suicide bags.

9. Where are proteins synthesised inside the cell?

Protein synthesis in cells takes place in ribosomes. Hence, ribosomes are also referred to as protein factories. Ribosomes are particles that are found attached to the rough endoplasmic reticulum.

Exercise Page: 67

1. Make a comparison and write down ways in which plant cells are different from animal cells.

The following table depicts the differences between plant cells and animal cells.

2. How is a prokaryotic cell different from a eukaryotic cell?

The following are the differences between prokaryotic and eukaryotic cells.

3. What would happen if the plasma membrane ruptures or breaks down?

If the plasma membrane ruptures or breaks down, then molecules of some substances will freely move in and out of the cells. As the plasma membrane acts as a mechanical barrier, the exchange of material from its surroundings through osmosis or diffusion in a cell won’t take place. Consequently, the cell would die due to the disappearance of the protoplasmic material.

4. What would happen to the life of a cell if there was no Golgi apparatus?

The Golgi apparatus consists of stacks of membrane-bound vesicles whose functions are as follows:

  • Storage of substances
  • Packaging of substances
  • Manufacture of substances

Without the Golgi apparatus, the cells will be disabled from packing and dispatching materials that were produced by the cells. The Golgi apparatus is also involved in the formation of cells. Hence, in the absence of the Golgi apparatus, cells will not be produced.

5. Which organelle is known as the powerhouse of the cell? Why?

Mitochondria are known as the powerhouse of the cell. It is because it releases the energy required for different activities of life. Mitochondria releases energy in the form of ATP (Adenosine triphosphate) molecules, essential for numerous chemical activities of life. Hence, ATP is often referred to as the ‘energy currency of the cell’.

6. Where do the lipids and proteins constituting the cell membrane get synthesised?

Lipids and proteins are synthesised in the ER (Endoplasmic Reticulum).

How does an Amoeba obtain its food?

Through the process of endocytosis, an Amoeba obtains its food. As its cell membrane is flexible enough, food particles are engulfed, forming a food vacuole girdling it, which is assisted by the pseudopodia. Amoeba secretes digestive enzymes to bring about digestion of the engulfed particle once the food is trapped.

Nutrition in Amoeba

What is osmosis?

The process of movement of a water molecule from a region of higher concentration to a region of lower concentration through a semipermeable membrane is known as osmosis.

9. Carry out the following osmosis experiment:

Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,

(a) Keep cup A empty

(b) Put one teaspoon sugar in cup B

(c) Put one teaspoon salt in cup C

(d) Put one teaspoon sugar in the boiled potato cup D.

Keep these for two hours. Then observe the four potato cups and answer the following:

(i) Explain why water gathers in the hollowed portion of B and C.

(ii) Why is potato A necessary for this experiment?

(iii) Explain why water does not gather in the hollowed-out portions of A and D.

(i) Water accumulates in the hollowed portions of B and C as a difference in the water concentration

is observed. Thereby, endosmosis occurs as the cells act as a semipermeable membrane.

(ii) Potato A is essential in this experiment as it is significant to compare different scenarios seen in

potato cups B, C and D. Potato A in this experiment clearly shows that the potato cavity on its

own cannot bring about water movement.

(iii) Cup in A does not show any change in the water flow concentration for osmosis to occur, which

requires concentration to be higher than the other. Cells in cup D are dead; thus, there is no

existence of a semipermeable membrane for water flow. Consequently, osmosis does not occur.

10. Which type of cell division is required for the growth and repair of the body, and which type is involved in the formation of gametes?

There are two ways in which a cell divides:

Mitosis is the type of cell division that is involved in the growth and repair of the body, whereas meiosis is a type of cell division which results in the formation of gametes.

The NCERT Solutions of Class 9 Science Chapter 5 is an integral part of Unit 2 – Organisation in the Living World and is expected to fetch around 20 marks. Therefore, this is quite an important chapter, and it becomes imperative that it is thoroughly learnt before attempting the CBSE exam.

The topics and subtopics of  NCERT Solutions of Class 9 Science Chapter 5 – The Fundamental Unit of Life

  • What Are Living Organisms Made Up of?
  • Plasma Membrane or Cell Membrane
  • Cell Organelles

Now, students can refer to the  NCERT Solutions for Class 9  of Science to learn in detail about these topics. Further, these NCERT Solutions are prepared by well-experienced teachers at BYJU’S, focusing on providing clarity on important and complex concepts and problem-solving skills.

Exercises with question count covered in NCERT Solutions for Class 9 Chapter 5

Exercise 5.1:  Page number 59 – Solution of 2 Questions Exercise 5.3:  Page number 63 – Solution of 4 Questions Exercise 5.4:  Page number 63 – Solution of 2 Questions Exercise 5.5:  Page number 65 – Solution of 4 Questions Chapter Exercise:  Page number 67 – Solution of 10 Questions

Life is all around us, from microscopic microbes to gargantuan whales. But if we were to take a closer look at all these organisms under a microscope, we would find the cell – the basic and fundamental unit of life.

A cell can be an individual organism – such as a bacteria, or it could amass and form a multicellular organism, like humans. Discover everything students need to know about the cell and learn its definition, types, characteristics and more by exploring our NCERT Solutions . Additionally, these NCERT Solutions  come in handy for last-minute revisions during CBSE exams.

Key Features of NCERT Solutions for Class 9 Science Chapter 5 – The Fundamental Unit of Life

  • Content delivered in an easy-to-learn format.
  • Solutions are crafted in-house by knowledgeable teachers.
  • Updated questions and solutions according to the latest prescribed syllabus.
  • Breakdown of the toughest exam questions from previous years.
  • Discover other additional resources like previous years’ question papers and sample papers.

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