Answer: The flow of individuals in and out of a population introduces new alleles and increases genetic variation within that population. Mutations are changes to an organism’s DNA that create diversity within a population by introducing new alleles.
Explanation:
Answer:
If we're talking about one specific element, then your answer is A) alike.
The build up in the child's ear prevent sound from reaching the eardrum.
True. Things such as a sponge, placozoa and stuff can be unicellular. But other bigger animals are multicellular, like a whale or dog.