Assertion (A) – Cell walls permit the cells of plants, fungi and bacteria to withstand
hypotonic external media without bursting.
Reason (R) – When a living plant cell loses water through osmosis there is shrinkage
or contraction of the contents of the cell away from the cell wall.
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(A) – Cell walls permit the cells of plants, fungi and bacteria to withstand
hypotonic external media without bursting.
Answer :- Cell walls permit the cells of plants, fungi and bacteria to withstand very dilute (hypo-tonic) external media without bursting. In such media the cells tend to take up water by osmosis. ... Because of their walls, such cells can withstand much greater changes in the surrounding medium than animal cells.
R) – When a living plant cell loses water through osmosis there is shrinkage
or contraction of the contents of the cell away from the cell wall.
Answer :- It is a complex substance and provides structural strength to plant cells. When a living plant loses water through osmosis there is shrinkage or contraction of contents of the cell away from cell wall. This phenomenon is known as plasmolysis.
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