Question

natural selection can make variations that are advantageous, or helpful, more common in population over many generations. but not all advantageous variations are affected by natural selection.
natural selection affects only variations that are inherited, or passed down from parents to offspring through genes. genes are pieces of hereditary material containing instructions to affect inherited traits.
natural selection does not affect variations that are acquired, or gained during an individuals life. acquired variations can be learned by an individual or caused by the environment, but they cannot be passed down through genes.
which of the following describe a mouse with a variation that could be affected by natural selection? select all that apply.
a mouse with black fur that was passed down through a gene
a mouse that develops a strong body from running a lot
a mouse that has a scar on its back after being injured
a mouse that inherited a strong sense of smell from its parents

Explanation:

Natural selection affects only inherited variations (passed down through genes). The first option (black fur via gene) and the fourth option (inherited strong sense of smell) are inherited. The second option (strong body from running) and third option (scar from injury) are acquired (not passed via genes).

Answer:

a mouse with black fur that was passed down through a gene, a mouse that inherited a strong sense of smell from its parents