Two Groups of Lizards That Have Long Been Living in Allopatry

Multiple Choice

Two groups of lizards that have long been living in allopatry have recently been reintroduced in the wild.When members of opposite groups mate,the hybrids are almost always inviable.Which of the following could be expected to occur over the long term if the populations remain in sympatry?

A) Hybrid sterility will eventually also develop.
B) Gene flow will reunite the groups into a single species.
C) Hybrids will become prevalent now that the groups are not isolated.
D) Behavioral forms of isolation will develop.
E) There is not enough information to decide which of these will happen.