Question

Juanita learns that gray tree frogs and green tree frogs both live in the southern United States. The gray tree frogs live in forests and blend in with the bark on the trees. The green tree frogs blend in with the tall reeds and grasses of the wetland areas. Natural selection helps the gray tree frogs in the forests and the green tree frogs in wetlands.

Natural selection is affected by which three factors?
A. reproduction
B. evolution
C. variation
D. overproduction
E. mechanism
F. competition

Answer 1

Natural selection is affected by variation, competition, and overproduction.

Step-by-step explanation:

Natural selection is affected by three factors:

1. Variation: There is variation of traits among individuals of a population. In the case of the gray tree frogs and green tree frogs, the gray tree frogs blend in with the bark on the trees, while the green tree frogs blend in with the reeds and grasses. This variation allows them to survive and reproduce in their respective environments.
2. Competition: There is competition for limited resources. In the case of the tree frogs, they compete for food, shelter, and mates.
3. Overproduction: More offspring are produced than can survive. This means that not all offspring will survive to reach reproductive age. This puts selective pressure on the population and allows only individuals with favorable traits to survive and reproduce.