Standard Science Primary 5 Systems

In an experiment, a ring of bark was removed from a stem. After a week, a swelling was observed above the ring. This is because __________.

A the plant is producing more sugar
B water cannot reach the leaves
C food cannot reach the roots
D the roots are growing faster
Show Worked Solution

Worked Solution

Step 1: Removing a ring of bark removes the phloem (food-carrying tubes). Step 2: Food is made in the leaves and travels down to the roots. Step 3: If the phloem is cut, the food accumulates above the cut. Step 4: This accumulation causes the swelling.

Correct answer: food cannot reach the roots

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