What does the axis in a seed do​

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

Which animal is a producer in this ecosystem

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