Why are genetic isolation and genetic divergence occurring in apple maggot flies, even though populations occupy the same geographic area?

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.