The divergence of three fruit fly species is shown here. A scientist has multiple lines of evidence for these fruit flies. Assess which evidence would BEST lend support that these fruit fly groups have fully diverged according to the biological species concept

Best evidence would be to interbreed these species with each other. If they can reproduce we can conclude that they have not diverged, however, if they cannot reproduce they have diverged. We can say this due to the biological species concept.

The biological species concept defines a species as members of populations that actually or potentially interbreed in nature, not according to similarity of appearance. Although appearance is helpful in identifying species, it does not define species according to biological species concept.

Hope this helps!

Explanation:

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?