Photosynthetic Adaptations · NCERT Biology

Why are CAM plants generally slow-growing compared to C4 plants?

  1. They lack chlorophyll
  2. CO2 uptake is limited to nighttime
  3. They perform photorespiration extensively
  4. They cannot use ATP efficiently
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Correct answer: CO2 uptake is limited to nighttime

CAM plants fix CO2 only at night, which limits the total amount of carbon fixed. This results in slower growth compared to C4 plants.

Difficulty: Medium Question 17 of 20

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