Spring 2009 Study Key

Spring 2009 Study Key - EEB100 Behavior Study Questions...

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Page 1 of 4 Study Questions Behavior- Selected Answers 1. *For the following hypotheses, state whether they are proximate: sensory motor, proximate: genetic/developmental, ultimate: historical/phylogenetic, or ultimate: adaptive utility. a. The brightness of male breeding plumage is affected by the number of parasites. ( P:SM) b. Ducklings can only undergo filial imprinting during the first two weeks after hatching. ( P:GD) c. Search image formation increases the foraging efficiency of consumers ( U:AU). d. Human fear of snakes is instinctual. ( P: GD) e. The complex mating song of lyrebirds signals the quality of their genes to females. ( U:AU) f. Eusociality has evolved multiple times in the hymenopterans (bees, wasps, and ants). ( U: HP) g. Territorial behavior in African lizards is correlated with testosterone level. ( P: SM) h. Female lions synchronize fertile periods to create coalitions that can care for cubs cooperatively. ( U:AU) . 8. The hormone prolactin has been hypothesized to play a function in parenting behavior. While studying mauve warblers, you observe variation in male parental care, and suspect that increased male parental care is driven by higher prolactin levels. a. Design an study to comprehensively test this hypothesis (hint: it will involve three experiments) (Experiment 1: Establish a correlation between prolactin levels and degree of male parental care. Experiment 2: Block the hormone, or otherwise remove the hormone from males, and establish that this causes a partial or complete loss of male parental behavior. Experiment 3: Reintroduce the hormone and establish that this returns function, i.e. male parental behavior). b. What type of hypothesis is this (e.g. proximate- sensory/motor)? (Answer: Proximate: sensory-motor) c. Another researcher hypothesizes that male parental care is advantageous is environments with more predators, because the males provide extra protection to the young. Are the hypotheses mutually exclusive? Why or why not? (No, because the second hypothesis is an ultimate hypothesis about adaptive utility. ) 14. To estimate the heritability of memory in pinyon jays, you set up a selection experiment measuring the maximum number of cache locations birds can successfully remember again, and call this number “cache recall.” In the original population, the average cache recall was 500 locations. You select the jays with the best memory to breed, a group with an average cache recall of 700. You measure the cache recall of the offspring of the selected group that was allowed to breed, and observe that it is 650. What is the heritability of cache recall? X=500
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Spring 2009 Study Key - EEB100 Behavior Study Questions...

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