For each situation, indicate the type of speciation described.

hundreds of years ago true fruit flies in the america west coast only laid eggs on native hawthorns (a native apple tree), but today one group of true fruit flies lay eggs on hawthorns, and one group lay eggs on imported apples.

[ choose ] sympatric speciation allopatric speciation
continents drift apart and separate previously connected lineages.

[ choose ] sympatric speciation allopatric speciation
different environments on two sides of a barrier cause populations to diverge.

[ choose ] sympatric speciation allopatric speciation
there are nine species of cichlid fish living in lake bermin (an isolated crater lake in cameroon). genetic data show that they are each others closest relatives, implying that they speciated there. the lake is only 0.6 km2 in surface area and 14.5 m deep, with no river feeders into or out of the lake.

[ choose ] sympatric speciation allopatric speciation
a mountain range separates formerly connected populations of rabbits.