The sympatric speciation of Hawthorn and apple maggot flies:
A) has occurred in part because the adult flies emerge at different times of the season.
B) has been linked to allopolyploidy.
C) has occurred as a result of mutation and speciation within the host species.
D) has resulted in subtle but distinctive changes in the physical appearance of the two flies.
E) has occurred because of a geographic barrier

Question

Quizplus · Accepted Answer

The sympatric speciation of Hawthorn and apple maggot flies has occurred because the adult flies emerge at different times of the season, which reduces gene flow between the populations and leads to reproductive isolation.

The Sympatric Speciation of Hawthorn and Apple Maggot Flies