On the Bahamian island of Andros, mosquitofish populations live in various, now-isolated freshwater ponds that were once united. Currently, some predator-rich ponds have mosquitofish that can swim in short, fast bursts; other predator-poor ponds have mosquitofish that can swim continuously for a long time. When placed together in the same body of water, the two kinds of female mosquitofish prefer to breed only with males that have their same swimming ability. Which of the following phenomena have helped promote divergence between the mosquito populations?
A) increased gene flow and sexual selection
B) bottlenect effect and sexual selection
C) bottlenect effect and founder effect
D) sexual selection and natural selection

Question

Quizplus · Accepted Answer

Sexual selection is evident in the females' preference for males with similar swimming abilities, and natural selection is seen in the adaptation of mosquitofish to either predator-rich environments (favoring short, fast bursts of speed) or predator-poor environments (favoring endurance swimming).

On the Bahamian Island of Andros, Mosquitofish Populations Live in Various