Which of the following occurs due to the stomatal opening?
I. Increased photosynthesis
II. Increased transpiration
III.Decreased chlorophyll

I only

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II only

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III only

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I and II only

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I, II and III only

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Solution

The correct option is B I and II only
When stomatal pore opens, exchange of gases and release of water vapour is increased. This causes photosynthesis and transpiration to increase.
Chlorophyll doesn't decrease due to opening of stomata. Also increased photosynthesis needs more Chlorophyll.
So the correct answer is 'I and II only'.

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