40. An investigator is interested in seeing how tall a certain species of plant will grow if it is kept
under red light for a month What would be valid hypothesis for this experiment?
a. If the light is red, then the plant will grow,
b. If the investigator uses pea plants, then there will be a lot of growth.
If plants are grown under different colored lights, then they will grow different heights.
d. If a month passes, then the plant will grow under the red light.
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