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
The frequency of competition according to the number of species involved.
Species of reef-building corals may be able to adapt to warming waters by relying on algae
Vesalius’s De Humani Corporis Fabrica was an important early work on the human species.
Reconstructed Australopithecus afarensis spine shows that species walked upright.
Measuring Attachment Styles: The Strange Situation Experiment
A hypothetical grid of data used in synteny testing