Standard Science Primary 5 Systems

A ring of bark was removed from the stem of a plant, as shown in the diagram. After a week, a swelling was observed ABOVE the ring. Why?

A Food cannot be transported to the roots.
B Water cannot reach the leaves.
C Mineral salts are stuck in the leaves.
D The plant cannot take in sunlight.
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Worked Solution

Step 1: Removing bark removes the phloem (food-carrying tubes). Step 2: Food made in leaves travels downwards to the roots. Step 3: The food gets stuck above the cut, causing the swelling.

Correct answer: Food cannot be transported to the roots.

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