Answer:
The first line of defense involves skin.
D. pressure from lava being pushed up from th earth adds new material to the ocean floor, creating a ridge
The answer would be D.
HWE states that genotype and allele frequencies in a population remain constant from generation to generation when evolutionary influences are absent(such as gene flow or natural selection).
Answer:
it prevents for things to go in and out of it, kinda like a cell membrane.
