Which of the following is NOT a function of the
cardiovascular system?
A. moving white blood cells to
infection sites
B. moving oxygen throughout the body
C. building immunity toward diseases
D. transporting nutrients throughout
the body

How does natural selection change thephenotypes within a population over time?

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.