The diagram above is an illustration of the growth of a plant in a water...

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?

A. use a non-green plant for the experiment
B. aerate the solution daily
C. cover the culture vessel with opaque paper
D. keep cotton wool around the seedling to make it dry

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Correct Answer: Option C

Explanation

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