« previous next »

Author Question: Rocky Mountain juniper (Juniperus scopulorum) and one-seeded juniper (J. monospe (Read 2034 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?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Animals and plants of the intertidal zone adhering to their rocky surface. Animals and plants of the intertidal zone adhering to their rocky surface.
Mountain sheep Mountain sheep
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
The Geologic Repository at Yucca Mountain, Nevada The Geologic Repository at Yucca Mountain, Nevada
A passenger train crosses Stony Creek Bridge in the Rocky Mountains in 1878. Railroads were importan A passenger train crosses Stony Creek Bridge in the Rocky Mountains in 1878. Railroads were importan
Binomial-probability calculation of seed-color phenotype in six-seeded pods Binomial-probability calculation of seed-color phenotype in six-seeded pods
Video: Introduction to Cystic Fibrosis

For a complete list of videos, visit our video library