Which phase of the cell cycle is dna copied?

What was darwins theory of common decent

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a

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 .