Question

an investigation was designed to study the effects of ultraviolet light on ferns. two groups of ferns were grown under identical conditions, except one group was exposed to uv light, while the other was grown in total darkness. in this experiment, the ferns grown without any uv light are known as the - limiting factor. hypothetical group. dependent variable. control group

Explanation:

In an experiment, the control group is the group that is not exposed to the independent variable (in this case, UV - light). It serves as a baseline to compare the effects of the independent variable on the experimental group. The ferns grown without UV - light are used for comparison to see the effects of UV - light on the other group of ferns.

Answer:

D. control group