Why is 60 minutes of exercise important to your heart muscle? (4 points) a It makes you hungry.
b It helps you breathe better.
c It makes your blood stronger.
d It makes your heart muscle stronger.

Hiv is inactivated in the laboratory after a few minutes of sitting at room temperature, but the flu virus is still active after sitting for several hours. what are the practical consequences of these findings? a) hiv can be transmitted more easily from person to person than the flu virusb) the flu virus can be transmitted more easily from person to person than hivc) this property of hiv makes it more likely to be a pandemic than the flu virusd) disinfecting surfaces is more important to reduce the spread of hiv than the flu