It may be harmful when people compete to see who can hold their breath the longer under water. Without oxygen, brain cells... A. cannot make enough ATP

B. have too many mitochondria

C. make too many enzymes

D. have too much water

i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /

i say yes because i mean like they were born at the same time "in genesis in the " no, because who knows what humans have affected first it could be the ocean floor or the continent. mostly the continent older because that's what we live on & we mostly make manmade things on it.how's that?