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Question

Which of the following structures help a cactus plant to reduce water loss through transpiration?

A
Flowers
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B
Spines
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C
Petioles
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D
Small roots
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Solution

The correct option is B Spines
The desert plants grow in water scarce areas. Hence, the leaves of cactus is modified into spines or needle like leaves to conserve water by minimising transpiration. A waxy coating is also found on the stem of these plants which reduces evaporation of water. The fleshy stems store water and food in cactus.

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