Assertion :Water absorption is reduced by lowering $O_{2}$ tension Reason: The accumulation of $C O_{2}$ reduces water absorption

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion:
Water absorption is reduced by lowering oxygen tension.
Reason:
The accumulation of carbon dioxide reduces water absorption.
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
The accumulation of carbon dioxide in the soil appears to have a greater inhibitory effect on water absorption than do lowered oxygen tensions. An increase in carbon dioxide causes an increase in the viscosity of protoplasm and a decrease in the roots permeability to water thereby bringing about a retardation in water absorption.

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