Q4.21. Which of the following statements about photosystems $\left(\mathrm{C}_{3}, \mathrm{C}_{4}\right.$, and CAM) is true?
Only a minority of Earth's plants rely on the $\mathrm{C}_{3}$ photosynthesis pathway.
CAM plants avoid photorespiration but have the cost of low water use efficiency.
Most $\mathrm{C}_{4}$ and CAM plants are found at high latitudes, in cool climates.
For $\mathrm{C}_{4}$ plants, the metabolic cost of avoiding photorespiration can be substantial.

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Accepted Answer

***D*** ∻Key Concept∻ ⚹C4 Photosynthesis and Metabolic Cost⚹ ∻Explanation∻ ⚹C4 photosynthesis involves additional steps to concentrate CO2 before entering the Calvin cycle, which reduces photorespiration but increases energy expenditure.⚹◊What are the main differences between the C3, C4, and CAM photosynthesis pathways in plants?⍭ Generate me a similar question◊

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