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Q.

Choose the incorrect statement.

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a

The pull created by transpiration, helps in absorption of water by roots and its transport through xylem towards the leaves.

b

The immediate cause of opening and closing of stomata is change in turgidity of guard cells.

c

During opening of stomata the inner walls of bean shaped guard cells attain a crescent shape.

d

Compared to C4 plants, C3 plants show lower transpiration and higher CO2 fixation rates.

answer is D.

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Detailed Solution

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Compared to C4 plants, C3 plants show higher transpiration and lower CO2 fixation rates. The transpiration ratio for C3 plant is 400 and for C4 it is 150.

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