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Question 1

Define cell.

  • A cell is the smallest part of any living thing. 
  • There are many parts of a cell. 
  • Each part of a cell completes a certain function for the cell.

Question 2

Who discovered cell?

Robert Hooke was the first person to discovery cell using a simple microscope.

Question 3

Mention the function of the following.

Cell Membrane
  • The cytoplasm and nucleus are enclosed within the cell membrane. 
  • Cell membrane separates cells from one another. 
  • It allows the movement of materials due to its porosity.
  • Chromosomes

  • Nucleus contains thread like structure called as chromosomes. 
  • These chromosome contain genes. 
  • Genes is a unit of inheritance in living organism. 
  • Inheritances is the transfer to parental characters to the off springs.
  • Question 4

    Why are following important to a plant cell.
    (a) Cell wall
  • It gives rigidity to plant cells. 
  • Bacterial cell also has a cell wall.
  • (b) Chloroplast

  • Chloroplasts are the "site" of photosynthesis in leaves. It has a green colored pigment chlorophyll,
  • (c) Plastids


  • Pigments give fruits and vegetables an orange or red color.
  • Plastids also store photosynthetic products and starch.
  • Foods full of starch contain many plastids. Potatoes, for example, have many plastids in their cells.
    • Plastids are organelles that exist only in plant cells.

    Question 5

    What advantage does Amoeba derive by changing shape?

    The change in shape is due to formation of pseudopodia which facilitates movement and help in capturing food.

    Question 6

    What is a tissue?

    A group of similar cells forming special functions is called tissues.

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