Question

although darwin did not know about genes, he could see that animals of the same species who had slight variations that helped them to survive longer could produce more offspring than animals who were not as well - equipped. which of the following could be an example of a variation that would help a group of animals survive? a) black bears in a region that was always covered with snow b) turtles with long necks on an island where the food source was elevated c) choosing a cat to take home from an animal shelter d) planting a certain kind of flower to attract butterflies

Explanation:

Variations that aid survival and reproduction are key in natural - selection. Black bears in a snowy region having a better - adapted trait (color for camouflage) compared to non - adapted ones is an example of such variation. Option A shows a trait (color) that could help black bears survive in a snowy environment by providing camouflage, which may increase their chances of survival and reproduction. Options B, C, and D are not examples of variations within a species that directly relate to survival and reproduction in the context of the question.

Answer:

A. black bears in a region that was always covered with snow