In an experiment, two populations of one species of fruit flies were raised for several generations on different nutrients (starch and maltose). Then the members of the two populations were reintroduced and the mating frequencies of flies from the two different populations were recorded. Fruit flies fed on starch were more likely to mate with other starch fruit flies. The same was the case for maltose fruit flies. When they did mate, their offspring were infertile. The fruit flies are physically indistinguishable and genetically similar. Match the characteristic with the correct species concept definition.

Group of answer choices

hybrids are fertile

[ Choose ] biological ecological morphological phylogenetic

physiologically similar

[ Choose ] biological ecological morphological phylogenetic

genetically similar

[ Choose ] biological ecological morphological phylogenetic

feed on starch or maltose

[ Choose ] biological ecological morphological phylogenetic