Standard Science Primary 4 Systems

Siti placed a plant in a dark cupboard for three days and watered it daily. After three days, she noticed the leaves turned yellow. Which function of the plant was mainly affected?

A The roots could not absorb water.
B The plant could not transport minerals.
C The stem could not support the plant.
D The leaves could not make food.
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Worked Solution

Step 1: Plants need light, water, and air to make food. Step [2-9]: In a dark cupboard, the leaves do not receive light. Step [2-9]: Without light, photosynthesis (food making) cannot occur, leading to yellowing leaves.

Correct answer: The leaves could not make food.

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