Can natural selection cause mutations? Why or why not?

A) no-natural selection prevents mutations

B) yes-mutations are where new alleles come from

C) yes-mutations can be beneficial

D) no-mutations are random

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation

What causes darkening of the skin as melanin production increases