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Question

Loss of water in C4 plants as compared to C3 plants for the same amount of CO2 fixed is

A
Double
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B
One third
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C
One fourth
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D
Half
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Solution

The correct option is B One third
A) The loss of water in C4 plants is much lesser than the loss of water in C3 plants.
B) The loss of water in C4 plants is reduced as they do not need to keep their stomata open for a long time to take in carbon dioxide due to the efficient C4 pathway and hence, reduce the loss of water through transpiration by one third.
C) The loss of water in C4 plants is one third that of C3 plants.
D) The loss of water is one third.
So the correct answer is 'One third'.

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