1.) It may be harmful when people compete to see who can hold their breath the longest underwater. Without oxygen, brain cells *
*O (1) cannot make enough ATP
(2) have too few mitochondria
(3) make too many enzymes
ОО
(4) have too much water
2) The diagram below represents one of many microscopic air sacs in a
2 points

Tessa’s friend milo offers her a ride home. tessa does not like riding with milo. he insists that everyone wear a seat belt, and he listens to classical music. he drives a small car, and usually texts while driving. why should tessa refuse milo’s offer? milo texts while driving. milo listens to classical music. milo drives a small car. milo insists that everyone wear a seat belt.