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IrinaVladis [17]
2 years ago
13

A student designed an experiment to test

Biology
1 answer:
Daniel [21]2 years ago
6 0

Answer:

D. All of above

Explanation:

This is because we can add temperature as a variable to improve the light, pH as a variable to improve the water, and remove water or light as a variable to make the experiment on light or water even obvious.

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