Which of these molecules does not enter the cellular respiration pathway?
O glycerol
O fatty acids
amino acids
O glucose
O all of these

How is an environment able to support different varieties of organisms?

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic