Study%20Questions%20after%20midterm%20II - Keen 2B F09...

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Keen 2B F09 Study Questions after Midterm II 1. Suppose you hear crickets chirping. Males call to attract females. One set of sounds has a series of short chirps followed by a long pause. The other set of sounds has three long chirps and a short pause. The field guide says that there are two closely related species present. Which of the following is likely? a) female crickets search for males visually b) the two cricket species are mechanically isolated c) the two cricket species are temporally isolated d) female crickets identify the species of male by the call e) spatial isolation keeps these two species apart 2. Still thinking about the crickets from question 1, suppose that females occasionally select a male of the wrong species as a mate. Which of the following would still allow two distinct or “good” species of crickets to persist? a) high survival and reproduction of hybrid offspring b) hybrid breakdown c) hybrid sterility d) b and c e) a, b, and c 3. If there is an error in meiosis so that a gamete has more than the typical number of chromosomes, and this gamete fuses with another just like it, the resulting zygote would be: a) haploid b) diploid c) triploid d) polyploid e) multiploid 4. The earliest horses are known from fossils to be small dog-like animals in genus Hyracotherium . Over evolutionary time there has been a steady change in the position of the feet while running. The number of toes on the ground has been reduced from 5 to 3 to 1. This kind of change within a single lineage is called: a) stasis b) extinction c) anagenesis d) cladogenesis e) speciation
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Keen 2B F09 5. What is a sister taxon? a) the ancestor of two modern species b) the part of a lineage that did not go extinct c) two species that live in the same place d) half of a lineage that split during cladogenesis e) the opposite of a brother taxon 6. A cladogram is: a) a graphical representation of ancestors and descendants b) a hypothesis about evolutionary relationships among taxa
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Study%20Questions%20after%20midterm%20II - Keen 2B F09...

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