According to sugar concentration theory, during ............, the guard cells begin photosynthesis.

Night

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Daytime

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Both A and B

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None of the above

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Solution

The correct option is B Daytime
According to the sugar concentration theory, during the daytime, the guard cells do photosynthesis. And the sugar is produced during the process and it increases the osmotic pressure which draws in the water from the adjoining cells due to endosmosis.

So the correct option is Daytime.

The correct option is B.

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