A well watered herbaceous plant exhibits a reduction in rate of transpiration in intense light; this is due to

Photo-oxidation of chlorophyll

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Loss of water from the soil

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High rate of photosynthesis

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Partial closure of stomata

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Solution

The correct option is B Partial closure of stomata
Light intensity required for stomatal opening is quite low. High light intensity partially closes stomata leading to decreased transpiration.

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