The shape of a plant cell is due, mostly, to the presence of the

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 of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?

Each hereditary trait corresponds to