The tick uses the dog for two reasons. 1.It uses the dog as a source of food. 2.It also uses a dog for means of transportation from one place too another. And so the dog gains nothing
Answer: Holds Genetic Information
Explanation:
There is no answer that is right except for C. Natural Selection.
Genetic Recombination doesn't change gene frequency;nor does migration. (Unless it's local)
Mutation could be the answer, but since mutations are too rare to really power Evolution, the only logical answer is Natural Selection.
Technically all of them depend on your nervous system. the respiratory, endocrine, skeletal, cardiovascular, digestive, and urinary. all of these are influenced by the nervous system.
-hope this helps<span />
