Assertion :Only vertical movement of water is possible through xylem and tracheids. Reason: The xylem ray parenchyma is responsible for the lateral transport of water only.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
Although vessels and tracheids are oriented in the plant in a vertical direction with respect to their long axis and water movement is predominantly in this direction lateral water movement does take place. Numerous pits through which water may pass perforate the side walls of vessels element and tracheids . The xylem ray parenchyma greatly facilitates the lateral transport of water and nutrients.
So, the correct answer is 'Both Assertion and Reason are incorrect'.

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