Ex2-2012

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Unformatted text preview: ecipients are encountered at equal frequencies, and there is low cost of rejecting a desirable, but a high cost of accepting an undesirable. Desirable and undesirable recipients are encountered at equal frequencies, and both the cost of rejecting a desirable and the cost of accepting an undesirable are equal. There is a very low probability of encountering undesirable recipients, and both the cost of rejecting a desirable and the cost of accepting an undesirable are equal. Are the following examples of cooperative breeding likely explained by the hard life hypothesis (A) or the habitat saturation hypothesis (B)? 30. 31. 32. 33. Cooperatively breeding fire salamanders (Salamandra pyroensis) can only set up territories in trees that have been damaged by forest fires. Cooperatively breeding yeti (Pseuohomo icelandensis) live in groups near the north pole. Territories of sand dune rodents (Mastacomys sandypants) in the Australian outback are great distances apart and predators are found in high densities. The coconut crab (Liocarcinus beachbum) set up nests in hollow coconuts which are difficult to come by. Rank the following four scenarios according to the predicted intensity of mother-fetus conflict, with A representing the highest conflict, and D the lowest. 34. 35. 36. 37. monogamy with high rate of extra-pair fertilization polyandry with strong sperm competition monogamy with low rate of extra-pair fertilization genes influencing conflict are entirely cytoplasmic, and thus only inherited from the mother SHORT ANSWER 38. (4 points) List and briefly expl...
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This note was uploaded on 01/13/2014 for the course BIONB 2210 taught by Professor Seeley during the Fall '10 term at Cornell University (Engineering School).

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