Because almost all small streams end up in bigger bodies of water.
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:
Has a Dorsal hallow nerve cord, a notochord pharyngeal pouches, and a tail that extends beyond the anus.
Explanation:
Answer:
A gene is a section in the chromosome or DNA and the alleles is the sequence.
Explanation:
The gene determines a specific trait. An allele represents the different variations and alternatives that could be passed on.