Physical activity causes an increase in your heart rate. Your body have to change the way it behaves so you don’t get ill or sick or pass out during physical exertion
The sum of all the genes in a population is referred to as the gene pool.
The blood flows through the vessels of the heart to keep it going
Around Autumn as the temp and pH of soils are vlose the the optimum
D. Mutations will always impact an individual on some level
Most of these seem accurate or at least close to being accurate on how mutations affect genes however, some mutations won’t always impact an individual because some mutations are so minor. But this is my best guess