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Question
Assertion (A): Dermal tissues in desert plants are thick and waxy.
Reason (R): Waxy coatings helps in transpiration.
Options
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
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Solution
A is true but R is false.
Explanation:
The assertion is true because desert plants (xerophytes) develop a thick, waxy outer layer of cutin over their dermal tissues as a structural adaptation to harsh, arid environments. However, the reason is completely false because this waxy coating acts as a highly effective barrier that prevents or reduces water loss through cuticular transpiration rather than helping it. By reducing evaporation, the wax allows the plant to conserve vital water in desert settings.
