Biology
WAEC 2021
The diagram above is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died. Use this to answer this question.
What precaution should have been taken to prevent the solution from turning green?
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A.
use a non-green plant for the experiment
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B.
aerate the solution daily
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C.
cover the culture vessel with opaque paper
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D.
keep cotton wool around the seedling to make it dry
Correct Answer: Option C
Explanation
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