Cork cells posses ...................... on their walls that makes them impermeable to gases and water.

Suberin

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Lignin

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Pectin

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Hemicellulose

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Solution

The correct option is A Suberin
Lignin and Pectin are impermeable to water but are absent in cork cells.
Hemicellulose is permeable to water and gases.
Cork cells are dead and have cell walls composed of a waxy substance "suberin", which is highly impermeable to gases and water. This substance prevents water loss from the stem.

So, the correct answer is option A.

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