One necessary element of the biological species concept is: a. homologous isolat

Question

One necessary element of the biological species concept is: a. homologous isolation b. divergent isolation. c. convergent isolation. d. reproductive isolation. Individuals organisms in a population: a. compete with other members of their species. b. differ in fitness from other members of their species. c. are adapted to their environment. d. are related by descent from a common ancestor. e. all of the above are true. The Northern elephant seal went through a severe population decline as a result of hunting in the late 1800s. The population has rebounded but is now homozygous for nearly every gene studied. This is an example of: a. negative assortive mating b. migration c. mutation d. a bottleneck e. disruptive selection. A small, reproductively isolated religious sect called the Dunkers was established by 27 families that came to the United States from Germany 200 years ago. The frequencies for blood group alleles in this population differ significantly from those in the general U.S. population. This is an example of: a. negative assortive mating b. migration c. mutation d. founder effect e. disruptive selection.

Explanation / Answer

26. d. reproductive isolation
27. e. all of the above are true
28. d. a bottleneck
29. d. founder effect

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