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Question

Which of the following is not a postulate of cell theory?


A

Cell is the basic unit of life.

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B

All cells develop from pre-existing cells.

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C

All living organisms are composed of cells.

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D

All living cells have cell walls.

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Solution

The correct option is D

All living cells have cell walls.


The main postulates of cell theory are:

• All living organisms are composed of one or more cells.

• Cell is the basic unit of structure, function, and organisation in all organisms.

• All cells come from pre-existing, living cells.

All living cells do not have cell walls. It is present only in plants, fungi and bacteria.

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