What view of the heart is this?

List two limitations of natural selection

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

_tissues respond quickly to outside stimuli a) epithelia b)nervous c)muscular d)muscular and nervous