Standard Science Primary 4 Systems

What is the function of the tiny openings (stomata) on the underside of leaves?

A To trap sunlight for photosynthesis.
B To transport food to the roots.
C To allow for the exchange of gases.
D To absorb water from the air.
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Worked Solution

Step 1: Stomata are tiny pores. Step [2-9]: They allow oxygen and carbon dioxide to enter or leave the plant. Step [2-9]: They also allow water vapour to escape (transpiration).

Correct answer: To allow for the exchange of gases.

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