What are three functions of the placenta?
pumps fetal blood, delivers nutrients, removes wastes oxygenates the fetal blood, digests nutrients, filters wastes pumps fetal blood, digests nutrients, filters wastes oxygenates the fetal blood, delivers nutrients, removes wastes

What is the next step in muscle contraction after the actin changes shape? (apex)

Iwanna go do something with my ideas? ?

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 .