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 unable to germinate and make pollen tubes on female ovules (which contain egg cells) of the other species, then which of these terms are applicable? 1. sympatric species 2. prezygotic isolation 3. postzygotic isolation 4. allopatric species 5. habitat isolation 6. reduced hybrid fertility
The shallow water and proximity of the sides of the channel effects the ship navigating through the restricted waters. ... This decreases the upward pressure on the hull, making the ship sink deeper in the water than normal and slowing the vessel.
