Advanced Science Primary 5 Systems

A ring of bark was removed from a plant stem at position X. After a week, a swelling was observed above position X. This is because __________.

A the plant is producing too much sugar
B water cannot be transported up to the leaves
C food cannot be transported down to the roots
D the xylem tubes were damaged
Show Worked Solution

Worked Solution

Step 1: Bark contains the phloem (food-carrying tubes). Step 2: Food is made in leaves and moves down. Step 3: Removing the bark stops food transport, causing it to accumulate and swell above the cut.

Correct answer: food cannot be transported down to the roots

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