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A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?

1. C3
2. C4
3. CAM
4. Nitrogen fixer

Correct answer: C4

Solution

C4 plants have improved water use efficiency, high rates of photosynthesis at high temperatures, and improved nitrogen utilization efficiency.

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