Standard Science Primary 5 Systems

A ring of bark was removed from a stem. After a week, the part above the ring swelled up. What was removed?

A Water-carrying tubes
B Food-carrying tubes
C Both water and food-carrying tubes
D The outer skin only
Show Worked Solution

Worked Solution

Step 1: Food is made in the leaves and transported downwards. Step 2: Removing the outer ring removes the phloem (food-carrying tubes). Step 3: Food gets stuck above the ring, causing the swelling.

Correct answer: Food-carrying tubes

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