Standard Science Primary 3 Diversity

Ravi painted the stem of a plant with a layer of thick oil. After a few days, the leaves at the top began to wilt. Why did this happen?

A The oil prevented the plant from breathing.
B The stem could no longer support the leaves.
C The stem could not transport water to the leaves.
D The oil prevented the leaves from making food.
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Worked Solution

Step 1: The stem contains tubes that transport water from the roots to the leaves. Step 2: Painting it with oil (though a bit extreme) or damaging it disrupts this flow. Step 3: Without water, the leaves cannot stay turgid and will wilt.

Correct answer: The stem could not transport water to the leaves.

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