W10 Exam #2 Key

W10 Exam #2 Key - 1 EEB 100 EACH OF THE FOLLOWING IS WORTH...

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1 EEB 100 EACH OF THE FOLLOWING IS WORTH 5pts, FOR 20pts PER QUESTION. Which of the following are proximate or ultimate questions about kin-biased behavior in tadpoles. P Can a tadpole recognize genetically similar odors of another tadpole it never met before? P Can a tadpole recognize the odor of another tadpole it never met before that was fed the same food? U Do groups of tadpoles have increased survival from predators over solitary tadpoles? U Do kin groups of tadpoles have increased survival from predators over non-kin groups of tadpoles? You observe a trail of ants going to a food source. Ants on the way to the food always run on the right side. Those coming back always run on the left side. Mark the following statements as being either proximate or ultimate in nature. U All other ant species in the same genus organize their trails in the same way. P Ants orient to the sun to determine on which side of the trail they ought to run. U Groups of ants that can organize their trails in this efficient manner will bring back the most food and eventually produce the most offspring. P When an ant starts on a trail it may go on the wrong side. After bumping into a few other ants it will learn on which side it needs to run. In the assigned reading by Clutton-Brock on sexual selection he contrasted the effects of sexual selection on males and females. Mark the following as True or False in terms of his conclusions. T Competition between females for resources can select for choosy males that can identify the best female. T Females more often compete for resources than for access to males. T Mating with more than one male can increase a female’s fitness. T Sexual ornaments often impose survival costs on males, but seem to have few such costs for sexually ornamented females. In the Alcock chapter on mating systems he discussed what females might gain from mating with many males. Mark the following as True or False in terms of what has been observed. F In honeybees the main reason queens mate with many males is to avoid running out of sperm. T In primate species where females normally mate with many males, females in these species have to invest more , on average, in immune system functions. F In primates, individual females that mate with many males are often unhealthy and maintain abnormally high white blood cell counts. T Multiple-mating females may gain good genes that increase the number and vigor of their offspring.
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2 Mark the following as True or False about Bateman’s rule. F At mating leks where males outnumber females, Bateman’s rule does not hold. F Bateman had 888 children and his wife had 69. F Bateman’s rule predicts males are always more sexually ornamented than females. F
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This note was uploaded on 12/06/2011 for the course EEB 100 taught by Professor Halpin during the Fall '08 term at UCLA.

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W10 Exam #2 Key - 1 EEB 100 EACH OF THE FOLLOWING IS WORTH...

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