Standard Science Primary 4 Systems

If all the leaves of a plant are covered with a layer of waterproof oil, why will the plant eventually die?

A It cannot exchange gases for photosynthesis and respiration.
B It cannot trap sunlight for photosynthesis.
C It cannot support its own weight.
D It cannot take in water from the roots.
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Worked Solution

Step 1: Stomata on leaves are responsible for gas exchange. Step [2-9]: Oil blocks these pores. Step [2-9]: Without carbon dioxide for photosynthesis or oxygen for respiration, the plant dies.

Correct answer: It cannot exchange gases for photosynthesis and respiration.

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