The answer is B. molecule, I know becuase I just took the test and got 100% Hope it helps
Answer:
b.sedimentary rock
Explanation:
because when magma cools it hardens
Answer:
The second one is correct
Explanation:
A leukocyte is responsible for the immune system
Answer:
The bottleneck effect, also known as a population bottleneck, is when a species goes through a "bottleneck" event that suddenly significantly reduces its population. ... The bottleneck effect is a type of genetic drift, which is defined as a random change in allele frequencies.
