Question

Rocky Mountain juniper (Juniperus scopulorum) and one-seeded juniper (J. monosperma) have overlapping ranges. If pollen grains that contain sperm cells from one species are unable to germinate and make pollen tubes on female ovules which contain egg cells of the other species, then which of the following terms are applicable?

1. sympatric species
2. prezygotic isolation
3. postzygotic isolation
4. allopatric species
5. habitat isolation
6. reduced hybrid fertility

Answer 1

Ans-) Option (a) and (b) are correct .

Prezygotic isolation means a process in which fertilization of eggs is preventable. This process utilizes gamete isolation ,and behavioural isolation etc.

Sympatric species : the two species are known as sympatric when they live together in particular area.