Rocky Mountain juniper (Juniperus scopulorum) and one-seeded juniper (J. monosperma) have overlapping ranges. If pollen grains (which contain sperm cells) from one species are able to germinate and make pollen tubes on female ovules (which contain egg cells) of the other species, but the zygote then aborts due to genetic factors, then which of these terms are applicable? (select a letter answer below) 1 and 2 1 and 3 1. sympatric species 2. prezygotic isolation 3. postzygotic isolation 4. allopatric species 5. habitat isolation 1, 3, and 4 2, 4, and 5 1, 2, and 5

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