In humans and other organisms, Which substance plays a central role as an energy sourse? A. water
B. carbs
C. fat
D. protien

Acquired mutations can result from radiation pollution toxins inheritence select all that apply

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.