What is protoplasm ?

Protoplasm is the living substance present in the living cells. The cytoplasm and nucleoplasm together forms the protoplasm.
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Define cell wall.


Cell wall is the outer protective covering found in cells.  It is found in plants and bacteria but is absent in animal cells. In plant which is chemically composed of cellulose. It determines the shape of the cell and provides a structural support. 

 

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Define nucleolus.

 It is a dense body present inside the nucleus. It is the site of RNA synthesis.
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Define cell.

The cell is the structure and functional unit of life.
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 Name the scientist who discovered the cell.

Rober Hooke.
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