Select the correct answer.
A blologist discovered a young, four-legged animal. The animal had lungs, seemed to fertilize internally, and Its outer surface was covered with
scales. In which class of animals is the biologist likely to place the animal?
A
fish
B. mammals
C. amphibian
D. reptile

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .