Two hundred years ago,the fly species Rhagoletis pomonella only laid its eggs on fruit of the hawthorn tree.Today,different "host races" of R.pomonella lay their eggs on hawthorns OR apples.Apples occur within the range of hawthorns,so divergence between apple flies and hawthorn flies could be the first step in sympatric speciation.Choose the evidence that would suggest that R.pomonella is currently undergoing sympatric speciation.Check all that apply.

Question

Quizplus · Accepted Answer

A) and B) suggest reproductive isolation mechanisms are in place, which is a key factor in sympatric speciation. A) indicates prezygotic isolation due to mating preferences, and B) suggests temporal isolation due to different emergence times.

Two Hundred Years Ago,the Fly Species Rhagoletis Pomonella Only Laid