Standard Science Primary 5 Systems

A ring of bark was removed from a plant stem at position X. After two weeks, a swelling was observed above the ring. This is because __________.

A the xylem was damaged
B water could not reach the leaves
C the plant could not absorb sunlight
D food made by the leaves could not reach the roots
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Worked Solution

Step 1: Bark contains the phloem (food-carrying tubes). Step 2: Removing a ring of bark prevents food from moving downwards. Step 3: Food accumulates above the cut, causing the swelling.

Correct answer: food made by the leaves could not reach the roots

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