Multiple choice

Plants take in CO2 and give off O2 through ____________, which located underneath leaves.

  1. stomata

  2. chloroplast

  3. cell wall

  4. mitochondria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Stomata are microscopic pores located primarily on the underside of plant leaves that facilitate gas exchange. They allow carbon dioxide to enter the leaf for photosynthesis and oxygen and water vapor to exit. Chloroplasts are organelles where photosynthesis occurs, but they are not the external pores.

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