Which of the following best describes what most experts believe about homo sapiens?
a. they arose out of africa less than 200,000 years ago
b. they arose from neanderthals about 1 million years ago
c. they arose from apes about 20 million years ago
d. they arose from china about 2 million years ago

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 .