Standard Science Primary 5 Systems

A ring of bark was removed from a stem, effectively removing the food-carrying tubes but leaving the water-carrying tubes intact. What will happen to the plant after one week?

A The roots will grow faster.
B A swelling will appear above the ringed part.
C The leaves will wilt immediately.
D The plant will grow taller.
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Worked Solution

Step 1: Removing bark removes phloem (food tubes). Step 2: Food made in leaves cannot reach the roots. Step 3: Food accumulates above the cut, causing a swelling.

Correct answer: A swelling will appear above the ringed part.

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