Question

what is a cell ?
for class 9
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Answer 1

Answer:

smallest structural and functional unit of an organism

Answer 2

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✿ Cell is the structural and functional unit of life.

✿ Robert Hooke discovered cell in 1665.

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✿ A cell is defined as the smallest unit of structure and functions of living organism.

✿ Robert Hooke discovered cell in the year 1665 when he was examining a thin slice of cork which resembled the structure of a honey comb.

✿ Cell theory was proposed by Matthias Schleiden and Theodor Schwann.

✿ Cell theory refers to the idea as cells are the basic unit of structure in every living thing. This theory made possible by advances in microscopy.

✿ This theory says that the new cells are formed from other existing cells, and that the cell is fundamental unit of structure, functions and organisation in all living things.