Standard Science Primary 5 Systems

Gaseous exchange in plants occurs through tiny openings called stomata. Where are these stomata most commonly found?

A On the underside of leaves
B On the petals of flowers
C On the roots
D On the stems
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Worked Solution

Step 1: Stomata allow CO2 to enter and O2 to exit. Step [2-9]: Most plants have a higher concentration of stomata on the lower surface of leaves to reduce water loss. Step [2-9]: Underside of leaves is the standard answer.

Correct answer: On the underside of leaves

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