Which of the following is an essential role played by large intestine bacteria?
a. produce gas
b. absorb bilirubin
c. synthesize vitamin k and b-complex vitamins
d. synthesize vitamins c and d

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .

Vessels draining the myocardium of the heart, open primarily ,into which chamber?