Relate Variation to Selection Pressure Practice Test

A mouse population shows heritable coat-color variation (light tan vs. dark brown). The mice live on very light-colored sand, and hawks hunt them by sight during the day. Which trait is most likely to be favored by natural selection in this environment?

A lizard population includes individuals with high heat tolerance and low heat tolerance (heat tolerance is heritable). Over several decades, average summer temperatures rise due to climate change. Which statement best describes how natural selection would act on this variation?