Question

describe in brief about the cell wall

Answer 1

A cell wall is the wall of acell in plants, bacteria, fungi, algae, and some archaea. Animal cells do not have cell walls, nor do protozoa. Cell walls protect the cells from damage. ... In plants and algae, the cell wall is made of long molecules of cellulose, pectin, and hemicellulose.





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by Priya

Answer 2

Hello friend

Your answer is given below :
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=> Definition : cell wall is the outermost, rigid, protective and supportive layer found in all the plant cells, bacteria, cyanobacteria and some protists. It is not found in animal cells.
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=> Discovery by Robert hooke ( 1665 A.D.)
=> Thickness. Varies from 0.1 um to 10um
=> structure : structurally, the plant cell wall is formed of two coats. 1 ) primary 2)secondary
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Primary cell wall

✔️occurs in all plant cells

✔️ position : inner to middle lamella

✔️pits : absent

✔️hydration : more (60%)

Secondary cell wall

✔️present only in mature and non dividing cells.

✔️position : inner to primary cell wall

✔️pits : present

✔️hydration :( 30 - 40 % )

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