Why are the tropics the most diverse areas?
a. they have the most nonnative species.
b. they have many secondary disturbances.
c. they have no predators.
d. they have stable temperatures?

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.

a lot of people sadly don't know the best way to learn is cheating off of your friends or this amazing thing called google

food source and hunting?