which experimental procedure would provide the best evidence for the effects of light on plants growth?
a. Measure plants are receiving different amounts of light in their natural environments.
b. Plant seeds in different soils and expose them to different amounts of light, then measure plant growth.
c. Plant seeds of the same variety in the same same conditions and very only the amount of light, then measure plant growth.
d. Measure plants of the same variety grown in environments that receive different amount of light.
c. Plant seeds of the same variety in the same conditions and vary only the amount of light, then measure plant growth.
By keeping all variables constant except for the amount of light that the plants receive, this experimental procedure would provide the best evidence for the effects of light on plant growth. This way, any differences in plant growth can be directly attributed to the amount of light the plants were exposed to.