Wich of these best describes a scientific law

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.

Why is excretion necessary to maintain homeostasis?

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp