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
Hypothetical evolution of stamens, carpels, and pistil
These species are all at risk of extinction. Species with “slow†life-h
Distributions of two barnacle species within the intertidal zone
There are 26 species of goanna in Australia.
In the box on upward social mobility on page 82, we discussed how Latinos face a similar situation. ...
Australia's spiny anteater, one of only three modern species of monotremes