A plant in your garden avoids photorespiratory losses, has improved water-use efficiency, shows high rates of photosynthesis at high temperature and uses nitrogen more efficiently. To which physiological group does it belong?

(a) C₃ Your answer
(b) CAM Your answer
(c) nitrogen fixer Your answer
(d) C₄ Correct

Your answer: Correct answer: (d)

Explanation

Why (d) is correct

These are the features of C₄ plants: they avoid photorespiration, use water and nitrogen efficiently, and keep high rates of photosynthesis at high temperatures and light.

Why the other options are wrong

(a) · your answer C₃ plants lose carbon by photorespiration, especially at high temperature.
(b) · your answer CAM plants save water but do not have high photosynthetic rates.
(c) · your answer Nitrogen fixation is a separate trait and does not explain these photosynthetic features.

NCERT point: C₄ plants have Kranz anatomy and a higher temperature optimum than C₃ plants.

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A plant in your garden avoids photorespiratory losses, has improved water-use efficiency, shows high rates of photosynthesis at high temperature and uses nitrogen more efficiently. To which physiological group does it belong?

Explanation

Why (d) is correct

Why the other options are wrong

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