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:

• Inherited differences (first option) are a key part of genetic variation.
• Variations decreasing reproductive success are less likely to be passed on (second option) follows natural selection principles.
• Variations causing population - wide changes over generations (third option) can occur via processes like natural selection or genetic drift.
• The fourth option says variations provide some individuals with an advantage, which is a fundamental aspect of how variation contributes to evolution (e.g., adaptive traits). The second option goes against the basic tenet of natural selection: traits that decrease reproductive success are selected against and thus less likely to be passed on. So the statement "Variations that decrease reproductive success are more likely to be passed on" is the least likely to describe variation.

Answer:

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