What tissue is specialized for the rapid diffusion of gases and nutrients across its cells?

The series of transgressions and regressions that produce cyclothems were likely produced by

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 .

As an asteroid comes close to earth, it's name will change to? apex