9. morning glories are plants that only open their flowers in the morning hours. one day, you notice a small group of morning glories whose flowers open in the evening. you imagine what might happen over many generations with these evening-flowering plants and conclude there is the possibility of a new species arising from this change in the timing of flowering. this is because: the change in timing of flowering could have occurred due to a bottleneck. the change in timing of flowering could be a prezygotic barrier. plants whose flowers do not open in the morning will not be self-fertile. plants that open their flowers in the morning are less fit. genetic drift will cause neutral alleles to go to fixation in both populations.