Lenticels and hydathodes are small pores with following common attributes except

Their opening and closing is not regulated.

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They allow exchange of gases.

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They always remain closed.

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They are found on the same organ of plants.

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Solution

The correct option is D They are found on the same organ of plants.
Lenticels and hydathodes both lack guard cells and hence, their openings are not regulated. Hydathodes are openings at end of vascular supply to leaves and are involved in the process of guttation, which is a loss of water in liquid form. Lenticels are lens shaped openings in big woody trunks of trees for gaseous exchange.
Thus the correct answer is option A.

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