Which type of organisms would have evolved to feed on other organisms as a direct consequence of an increase in the amount of oxygen in oceans? A: aerobic autotrophs

B: aerobic heterotrophs

C: anaerobic autotrophs

D: anaerobic heterotrophs

i am positive it is c. condensing but i may be wrong

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.

the answer is b. glad to .