Root cap has no function in water absorption, because

Its vascular system is not directly connected.

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Its cells are loosely placed.

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It has cells without chloroplast.

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It has no root hair.

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Solution

The correct option is D It has no root hair.
Absorption is a function of root hair. Root hair are extensions of root epidermal cells and their function is to increase the absorptive surface. Root cap is devoid of root hair, hence no absorption occurs in root cap region.
So, the correct answer is 'It has no root hair.'

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