Evolution Question
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When cross pollination is attempted between two closely related, sympatric species of violets, it is found that the pollen of species A cannot reach the egg of species B because is lacks the proper enzyme to travel down to the location of the egg. Likewise, the pollen of species B cannot reach the egg of species A, this is an example of?
- postzygotic isolating mechanism
- prezygotic isolating mechanism
- geographical isolation
- hybrid inviability