« previous next »

Author Question: Rocky Mountain juniper (Juniperus scopulorum) and one-seeded juniper (J. monospe (Read 2146 times)

j_sun

  • Sr. Member
  • ****
  • Posts: 384
on: Jul 11, 2013
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 is applicable?
A) behavioral isolation
B) mechanical isolation
C) hybrid breakdown
D) reduced hybrid viability


coco

  • Hero Member
  • *****
  • Posts: 739
Reply #1 on: Jul 12, 2013
Hey again :D

I'm guessing it's B. It makes sense.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

j_sun

  • Sr. Member
  • ****
  • Posts: 384
Reply #2 on: Aug 31, 2013
You're the best, thank you


« previous next »
 

Did you know?

People about to have surgery must tell their health care providers about all supplements they take.

Did you know?

Green tea is able to stop the scent of garlic or onion from causing bad breath.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

A rocky shore at low tide, showing the great abundance that can be attained by populations of intert A rocky shore at low tide, showing the great abundance that can be attained by populations of intert
Jens Roland and colleagues marked (notice the QME on the wing) and recaptured many Rocky Mountain Pa Jens Roland and colleagues marked (notice the QME on the wing) and recaptured many Rocky Mountain Pa
California ground squirrel (Spermophilus beecheyi) in the man-made rocky shoreline of the Berkeley M California ground squirrel (Spermophilus beecheyi) in the man-made rocky shoreline of the Berkeley M
Top down view of Olympus Mons, the highest known mountain in the solar system Top down view of Olympus Mons, the highest known mountain in the solar system
Mono Mind - Save Me A Place (Bridge & Mountain Remix) SiriusXM bpm Mono Mind - Save Me A Place (Bridge & Mountain Remix) SiriusXM bpm
Foja Mountain Foja Mountain
Video: Acids and bases - definition

For a complete list of videos, visit our video library