Standard Science Primary 5 Systems

Ravi removed a ring of bark from a plant, which included the food-carrying tubes but not the water-carrying tubes. After a week, he noticed a swelling above the ring. Why?

A The plant could not take in sunlight.
B Food made by the leaves could not reach the roots.
C Water could not reach the leaves.
D The roots could not absorb water.
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Worked Solution

Step 1: Phloem (food-carrying tubes) are in the outer layer/bark. Step 2: Food made in leaves travels downwards to roots. Step 3: Removing the ring blocks food, causing it to accumulate and swell above the ring.

Correct answer: Food made by the leaves could not reach the roots.

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