Question

which statement would least likely be used to describe variation?
○ variations are inherited differences between individuals of the same species.
○ variations that decrease reproductive success are more likely to be passed on.
○ variations may result in changes to an entire population after many generations.
○ variations provide some individuals with an advantage.

Explanation:

To determine the least likely statement about variation, we analyze each option:

• Option 1: Variations are inherited differences in the same species. This is a correct description of genetic variation.
• Option 2: Variations that decrease reproductive success are more likely to be passed on. By natural selection, traits (variations) that decrease reproductive success are less likely to be passed on, as individuals with such traits are less likely to reproduce. This statement is incorrect.
• Option 3: Variations can lead to population changes over generations (evolution). This is correct.
• Option 4: Variations can give some individuals an advantage (e.g., better adaptation). This is correct.

Answer:

B. Variations that decrease reproductive success are more likely to be passed on.