Assertion : Except for plants in shade or in | vedclass

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Question

(B) The Assertion is true because,in natural ecosystems,light is usually available in abundance for most plants,except for those growing in deep shade

Vedclass · Accepted Answer

Both Assertion $\&$ Reason are True but Reason is not a correct explanation of the Assertion.

Vedclass · Answer

(B) The Assertion is true because,in natural ecosystems,light is usually available in abundance for most plants,except for those growing in deep shade or dense forest canopies where light becomes a limiting factor.The Reason is also true because $C_4$ plants have evolved to efficiently utilize high light intensities for photosynthesis without showing light saturation at lower levels compared to $C_3$ plants.However,the Reason does not explain why light is rarely a limiting factor in nature for most plants. The availability of light in the environment is an ecological condition,whereas the response of $C_4$ plants to high light is a physiological adaptation. Therefore,the Reason is not the correct explanation for the Assertion.

Assertion $:$ Except for plants in shade or in dense forests,light is rarely a limiting factor in nature.
Reason $: C_4$ plants respond to high light intensities.

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Assertion $:$ Except for plants in shade or in dense forests,light is rarely a limiting factor in nature.Reason $: C_4$ plants respond to high light intensities.