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Solutions 8. Cell - Structure and functions - Chapter Review | Class 8 Science - Toppers Study

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Solutions 8. Cell - Structure and functions - Chapter Review | Class 8 Science - Toppers Study

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Chapter 8 Science class 8

Chapter Review class 8 Science Chapter 8. Cell - Structure and functions

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Solutions 8. Cell - Structure And Functions - Chapter Review | Class 8 Science - Toppers Study
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Chapter 8. Cell - Structure And Functions Chapter Review Class 8

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8. Cell - Structure and functions

| Chapter Review |

Solutions 8. Cell - Structure and functions - Chapter Review | Class 8 Science - Toppers Study

Chapter Review:

The structural and functional unit of the living organism is called cell.
Cells were first observed in cork by Robert Hooke in 1665.
The smallest living part of an organism is a ‘cell’.
Cells exhibit variety of shapes and sizes.
The organism which is made of only one cell that is called unicellular organism. Ex : amoeba and paramecium.
The organism which is made of more than one cell are called multi cellular organism. Ex : human and tree.
A tissue is a group of similar cells having a specific function
The nucleus contains thread-like structures called chromosomes.
Genes control the transfer of hereditary characteristic from parent to offspring; it is carried by the chromosomes.
Green colour plastid is called chloroplast.
The nerve cell receives and transfers messages, thereby helping to
control and coordinate the working of different parts of the body.
The smallest cell is 0.1 to 0.5 micrometre in bacteria. The largest
cell measuring 170 mm ×130 mm, is the egg of an ostrich.
Gene is a unit of inheritance in living organisms. It controls the transfer of a hereditary characteristic from parents to offspring.
Nucleus is separated from the cytoplasm by a membrane called the nuclear membrane.
The cells having nuclear material without nuclear membrane are termed prokaryotic cells.Examples are bacteria and blue green algae.
The cells, like onion cells and cheek cells having well organised nucleus with a nuclear membrane are designated as eukaryotic cells.
They are scattered in the cytoplasm of the leaf cells. These are called plastids.
Coloured bodies called plastids are found in the plant cells only.
Green plastids containing chlorophyll are called chloroplasts.

Other Pages of this Chapter: 8. Cell - Structure and functions

1. Chapter 8. Cell - Structure and functions | Chapter Review

2. Chapter 8. Cell - Structure and functions | Text Book Exercise

3. Chapter 8. Cell - Structure and functions | Text Book Exercise

4. Chapter 8. Cell - Structure and functions | Additional Questions With Solutions

5. Chapter 8. Cell - Structure and functions | Additional Questions With Solutions

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