I believe blood vessels constrict
Yes they did. It is generally known that amphibians breathe through their skin.
I believe it is either B or A, personally i'm leaning towards B, but at the same time, i don't think that we would be obtaining materials via pollination, so it then causes A to make more sense.
Mechanical energy to chemical energy, i believe
Answer:
You answer is A
Explanation:
A combination of high salinity and low temperature near the surface makes seawater dense enough to sink into the deep ocean. Hopefully this help if it didnt my bad