Multiple choice

In deserted areas, why do plants tend to be C4 plants?

  1. Increase of CO2 in the atmosphere

  2. Lack of oxygen in the atmosphere

  3. Lack of CO2 in the atmosphere

  4. Increase of oxygen in the atmosphere
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In hot, dry desert environments, plants close their stomata to conserve water, which restricts CO2 entry into the leaves. C4 plants are adapted to efficiently fix carbon even when internal CO2 levels are extremely low, minimizing photorespiration.

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