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Question

The deposition of suberin occurs in which of the following cells to make them impermeable to water?

A
Sieve tube
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B
Cork
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C
Bark
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D
Companion cell
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Solution

The correct option is D Cork
Suberin is a waxy layer. It is impermeable to both gases and water. A mature cork cell is non-living and has cell walls that are composed of this waxy substance - suberin. Suberin prevents excess loss of water.
Thus, the correct option is B.

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