Ascientist is designing an investigation to study the impact of uv radiation present in high-altitude habitats on the population of mountain yellow-legged frog. what type population is most likely to be a control group for the study?

A population of the frogs that do not receive the UV radiation would work as a good control group. In this case, since the impact of the radiation is the variable under study, a group that receives no radiation, and thereby should not exhibit a change, would be a control group that could be compared against the frogs that do receive the radiation.