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

What new form of music swept the nation in the 1950s a. chamber music b. hip-hop c. jazz d. rock-and-roll

The array of significant individuals who serve as sources of social support is called the social

Read the quote about government in iran. “we thought that mr. khatami’s victory was a victory for us as well. the election of a more democratic government seemed to be a bright new beginning . . but within less than a year of the election, the journalists, reformists, and intellectuals began to be persecuted by hard-liners in the judiciary and intelligence ministry . .” —camella entekhabifard, “tehran’s eternal youth,” new york times based on this quote, how does camella entekhabifard feel about the iranian government? a. she supports reforms and was disappointed when they did not come about. b. she supports hard-liners who want the supreme leader to have more power. c. she believes reformers should be silenced to keep iran's government strong. d. she supports a more democratic government but opposes freedom of speech.