Question

if females begin selecting mates with the strongest climbing abilities, which mechanism is occurring?

• gene flow
• genetic drift
• artificial selection
• nonrandom mating

which evidence would best support the claim that both natural selection and gene flow contributed to the population changes?

• survivors show no trait differences
• migrants lack climbing ability entirely
• only migrants show strong climbing ability
• survivors and migrants show strong climbing ability

Explanation:

For the first question: Nonrandom mating occurs when individuals choose mates based on specific traits, here females selecting mates with strong climbing abilities fits this definition. Gene flow involves transfer of genes between populations, genetic drift is random allele frequency change, and artificial selection is human-driven, none match the scenario.
For the second question: Natural selection would lead to survivors having favorable traits (strong climbing ability), while gene flow means migrants with that trait move into the population. If both survivors and migrants have strong climbing ability, it shows both mechanisms contributed. Other options don't align with both factors acting.

Answer:

1. Nonrandom mating
2. Survivors and migrants show strong climbing ability