PLZ HELP I WILL GIVE YOU BRAINLIST​

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 reason best illustrates why hershey and chase chose to use viruses in their experiment?

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.