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Sherwins research team 65 speculated that ecological

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Sherwin’s research team (65) speculated that ecological or social constraints during the evolution of this species might have resulted in there being little benefit from the (70) social learning of unpal- atability, for instance, selective pressures for this mode of learning would be reduced if the birds rarely (75) encountered noxious or toxic food or rarely inter- acted after eating such food, or if the consequences of ingestion were minimal. (80) In a related experiment, the same researchers showed that if observer hens watched demonstrator hens react favorably to food (85) of a particular color, then observer hens ate more food of that color than they ate of food of other colors. These results confirmed that (90) avian species can develop preferences for palatable food through social learning. -------------------------------------------------------------------------------- Q3: The primary purpose of the passage is to discuss the A. techniques used in certain experiments on social learning in birds B. reasons for the differences between social learning in birds and in mammals C. question of how social learning manifests itself in birds D. basis for a widespread belief about a difference in behavior between birds and mammals E. possible reasons why birds may or may not learn from each other in a particular way Answer: -------------------------------------------------------------------------------- Q4: Missing!
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-------------------------------------------------------------------------------- Q5: According to the passage, which of the following is true of the experiments on domestic hens conducted by Sherwin’s research team? A. Only a small number of observer hens appeared to learn to avoid food that was demonstrated by other hens to be noxious. B. Observer hens ingested food preferentially only after numerous instances of witnessing demonstrator hens preferentially ingest that type of food. C. Observer hens appeared unable to recognize when demonstrator hens found a particular food especially palatable. D. Demonstrator hens reacted adversely to ingesting certain novel foods. E. Demonstrator hens altered their behavior less obviously in response to noxious foods than in response to highly palatable foods. Answer: -------------------------------------------------------------------------------- Q6: It can be inferred that the author of the passage would be most likely to agree with which of the following statements regarding the results of the recent experiments conducted by Sherwin’s research team? A. The experiments demonstrate that social learning in avian species facilitates the identification of noxious or toxic foods. B. The experiments suggest that social learning has made avian species less adept than nonavian species at learning to prefer beneficial foods and avoid noxious and toxic foods. C. The experiments undermine the notion that most avian species have evolved in
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Sherwins research team 65 speculated that ecological or...

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