Standard Science Primary 6 Energy

A plant was kept in a dark room for two days before an experiment. What was the purpose of this?

A To allow the plant to breathe more
B To make the plant grow taller
C To ensure the plant has no starch left in its leaves
D To help the plant absorb more water
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Worked Solution

Step 1: In the dark, a plant cannot perform photosynthesis. Step [2-9]: The plant will use up its stored starch for energy. Step [2-9]: This "destarching" ensures that any starch found later was produced during the actual experiment.

Correct answer: To ensure the plant has no starch left in its leaves

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