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? mountain frogs in low-altitude habitats only mountain frogs in their natural high-altitude habitat mountain frogs in a lab setting exposed to uv rays from a sun lamp mountain frogs in a lab setting with no uv ray exposure

The correct answer is the mountain frogs in a lab setting with no UV rays exposure.  

The frog populations, which do not acquire the ultraviolet radiation would function as a good control group. In this case, as the influence of the radiation is the variable under examination, thus, a group that acquires no radiation would exhibit no variation, and thus, would function as a control group that could be compared against the frogs, which do receive the radiation.  

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

is this for the e2020 class