In a hypothetical situation, a certain species of flea feeds only on pronghorn antelopes. In rangelands of the western United States, pronghorns and cattle often associate with one another. If some of these fleas develop a strong preference for cattle blood and mate only with other fleas that prefer cattle blood, then over time which of these should occur, if the host mammal can be considered as the fleas' habitat?
1. reproductive isolation
2. sympatric speciation
3. habitat isolation
4. prezygotic barriers
A) 1 only
B) 2 and 3
C) 1, 2, and 3
D) 2, 3, and 4
E) 1 through 4
Invasive species provide an example of predator pressure.
Older adults may grieve intensely over the loss of a person or situation that has been a part of the
The transition from college to first job can be a triggering situation for new growth in meaning ...
Four kinds of evidence supporting the theory that species evolve.
Species-area curves
Philippine Tarsier (Tarsius syrichta), Philippine Islands, a threatened species.