Question

Why cell called as basic unit of life

Answer 1

Because if there will be no cell no human will be there

Answer 2

Question:

★ Why is cell called basic unit of life?

Answer:

[Refer to attachment for the diagram of a cell]

→ Cells are known as the basic, structural and functional unit of life. All the living organisms are made up of tiny particles which are known as cells. It carry out all the vital functions and life processes inside an organism. It provides a definite structure/shape to an organism.

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Know more :

※ A cell which includes the following features are present in every cell :-

1. Plasma membrane
2. Nucleus
3. Cytoplasm

※ A simple cell will include plasma membrane, cell wall (only in plant cell), cytoplasm, nucleus and a nucleolus.

※ Chromatin material is a thin thread like structure which is composed of DNA ( Deoxyribonucleic Acid) and proteins.

※ There are mainly three transport across plasma membrane :

• Passive
• Active
• Bulk

※ Diffusion plays an important role in exchange of gases between cells and its external environment.

※ Osmosis is movement of water molecules through the selective permeable membrane. It includes three kinds of solution :

• Hypotonic solution
• Isotonic solution
• Hypertonic solution

※ There are many cell organelles present in a cell :

1. Mitochondria
2. Endoplasmic reticulum (Smooth, Rough)
3. Golgi apparatus
4. Lysosomes
5. Ribosomes
6. Plastids (present only in plant cell)
7. Vacuoles

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