Standard Science Primary 5 Systems

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

A The part of the stem above the ring will swell.
B The leaves will wilt immediately.
C The roots will grow faster.
D The plant will die in 2 hours.
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Worked Solution

Step 1: Phloem carries food from leaves to other parts. Step 2: If removed, food produced in leaves cannot reach the roots. Step 3: Food accumulates above the cut, causing a swelling.

Correct answer: The part of the stem above the ring will swell.

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