The is composed of circularly arranged layers of smooth muscle cells.

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

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 .