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

In this chapter, you’ll learn about ‘cell’, which is considered as the fundamental
unit of life. What do you mean by cell? A ‘cell’ actually means a ‘small room’. It was
first Robert Hooke, an English Botanist who used the word ‘cell’ to describe as the
fundamental unit of life in 1665. The structure of an organism as well as the
functions performed inside, all are done with the help of cells. In fact, cell is the
smallest functional unit of life. In NCERT Solutions for Class 9 Science, Chapter
5, you’ll study the structural organization of cells and different terms related to it.

Let’s take a look at topics and sub-topics of Class 9 Science Chapter 5, The Fundamental Unit of Life

5.1 What are Living Organisms made up of?
5.2 What is a Cell Made Up of? What is the Structural Organisation of a Cell?
5.2.1 Plasma Membrane or Cell Membrane
5.2.2 Cell Wall
5.2.3 Nucleus
5.2.4 Cytoplasm
5.2.5 Cell Organelles
5.2.5 (i) Endoplasmic Reticulum (ER)
5.2.5 (ii) Golgi Apparatus
5.2.5 (iii) Lysosomes
5.2.5 (iv) Mitochondria
5.2.5 (V) Plastids
5.2.5 (vi) Vacuoles

In Class 9 Science Chapter 5, you will learn -

Section 5.1 – In this section, you’ll study what living organisms are made up of. It
is interesting to know that all living organisms are made up of cells. You’ll also
learn about unicellular (single cells that live on their own) and multi-cellular
organisms and get a clear understanding of what is an amoeba, chlamydomonas,
paramoecium and bacteria.

Section 5.2 – In this section, you’ll learn about the different characteristics of cells.
You’ll also come across related terms like plasma membrane or cell membrane,
cell wall and plasmolysis, nucleus and cytoplasm. You’ll be able to answer
questions like what will happen if you put an animal cell or a plant cell into a
solution of sugar or salt in water. You’ll also learn what are chromosomes, the role
of a nucleus, eukaryotes, the difference between a prokaryotic cell and eukaryotic
cell and much more.

In this chapter, you are provided with several diagrams, activities and examples
with their solutions for a clear understanding of The Fundamental Unit of Life.
To know more about NCERT Solutions for Class 9 Chapter 5 you should explore the exercises mentioned in this chapter. You can also download The Fundamental Unit of Life Class 9 Solutions PDF, solved by our science experts.

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