Advanced Science Primary 5 Systems

Ravi removed a ring of bark from a tree trunk, which included the food-carrying tubes but not the water-carrying tubes. What will happen after a week?

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

Step 1: Food is made in leaves and transported down via phloem. Step 2: Removing phloem stops food from reaching roots. Step 3: Food accumulates above the cut, causing tissue swelling.

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

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