Multiple choice

Increase in the CO2 concentration of micro-environment of leaf would cause

  1. closure of stomata

  2. opening of stomata

  3. no effect to stomata

  4. flaccidity of guard cells

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An increase in CO2 concentration in the leaf's micro-environment generally triggers the closure of stomata. This response helps the plant conserve water when CO2 levels are sufficient for photosynthesis.