What factor is most important in the cell differentiation that occurs during the metamorphosis of a tadpole into a frog A. the frequency with which females are able to reproduce

B. the expression of different genes at different times

C. the variation in temperature at a given time of year

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

well, i believe that the answer is 2. : 3