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Unformatted text preview: Indiana University Bloomington Evaluation Services and Testing QuizSite Students Quizzes Tests Evaluations Surveys Activity Results: PracQ2a Student: shengeve (Susan Instructor: shengeve Course: L111 Section: 1142 Question 1. Two species of frogs belong to the same genus occasionally mate, but the offspring do not complete development. This is an example of ______. a. the postzygotic barrier called hybrid inviability b. the postzygotic barrier called hybrid breakdown c. the prezygotic barrier called hybrid sterility d. gametic isolation e. adaptation Your answer - a. the postzygotic barrier called hybrid inviability - is correct! (1 / 1) Question 2. In the frog genus, Rana, the embryos of hybrids are usually inviable, and therefore there should be ______. a. a decrease in the reproductive success of all species, since they can't hybridize b. strong selection for a prezygotic mechanism to prevent mating between species from occurring in the Frst place c. an increase in the frequency of hybridization, to increase chances of having viable offspring d. strong selection on the formation of postzygotic isolating mechanism to reinforce the impact of the hybrid inviability e. "a" and "c" Your answer - b. strong selection for a prezygotic mechanism to prevent mating between species from occurring in the Frst place - is correct! (2 / 2) Question 3. A biologist discovers two populations of wolf spiders whose members appear identical. Members of one population are found in the leaf litter deep within the woods. Members of the other population are found in the grass at the edge of the woods. The biologist decides to designate the members of the two populations as two separate species. Which species concept is this biologist most closely utilizing? a. ecological b. biological c. phylogenetic d. evolutionary Your answer - a. ecological - is correct! (3 / 3) Question 4. Bird guides once listed the Myrtle Warbler and Audubon's Warbler as distinct species, but applying the biological species concept, recent books show them as eastern and western forms of a single species, the Yellow-rumped Warbler. Experts must have found that the two kinds of warblers, ______. a. live in the same area b. successfully interbreed in nature c. look enough alike to be considered on species d. are reproductively isolated from one another e. are allopatric Your answer - b. successfully interbreed in nature - is correct!...
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This note was uploaded on 01/18/2012 for the course BIOL L111 taught by Professor Dr.susanhengeveld during the Fall '11 term at Indiana.
- Fall '11