Question: The habitat of one species of frog is the tall green grasses in a swamp. The vast majority of the frogs in this population are green. A few individual frogs carry a mutation that prevents the production of the green pigment; as a result these individual frogs are brown. The temperature in this area rises and less rain falls over a 10 year period, and as a result the swamp begins to dry up and the grasses turn brown. Using what you have learned about natural selection, explain how this change in environment may have affected the evolution this frog population (not including possible direct effects of warmer temperatures and less rain on the frogs). Include the following terms in your explanation: allele frequency, selective pressure, differential reproduction, beneficial trait, evolution.