During bright daylight, why is the carbon dioxide concentration inside leaf mesophyll air spaces low?

Type: MCQ • Marks: 1

A. CO2 is rapidly consumed by photosynthesis in chloroplasts

B. CO2 dissolves into starch

C. Guard cells absorb all CO2

D. CO2 is pushed out by roots

Explanation

Rapid photosynthetic carbon fixation depletes internal CO2, creating a steep gradient that draws CO2 in from outside air.

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