Standard Science Primary 5 Systems

Siti removed a ring of bark from the stem of a plant. After a week, she noticed a swelling above the ring. What does this show?

A Water cannot be transported downwards.
B Water cannot be transported upwards.
C Food cannot be transported downwards.
D Food cannot be transported upwards.
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Worked Solution

Step 1: Removing the outer bark removes the phloem (food-carrying tubes). Step 2: Food is made in the leaves and transported down to the rest of the plant. Step 3: The swelling above the ring shows food accumulating because it cannot pass the gap.

Correct answer: Food cannot be transported downwards.

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