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ISBN: 9780136858287
Author: Taylor
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Chapter 35, Problem 4TYK
Summary Introduction
Introduction:
The red-winged blackbird belongs to the order Passeriformes and Icteridae family. It is mainly found in NA and most of central A. This bird is sexually dimorphic. Males are black in color with red shoulders and females are dark brown.
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In the eclectus parrot (Eclectus roratus), mothers sometimes take parental favoritism to extreme lengths by killing their sons, but never their daughters (Heinsohn et al. 2011). Sex-specific infanticide occurs more often at nests that can be flooded during the rainy season. Sons spend longer in the nest than daughters. Link this factor to why it might be adaptive for a parent parrot to kill a son in a vulnerable nest occupied by offspring of both sexes.
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Match the scenario to the type of sexual selection:
Question
10 male parrots wish to mate with a female. The female chooses to mate with the male that has the brightest tail feathers.
Male giraffes perform mating dances. The ones that perform the dance better are chosen by the female as a mate.
Male kangaroos fight each other, the winner claims the female to mate with.
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The impressive feathers of a male peacock are the result of this type of sexual selection
All Answer Choices
A.
Intrasexual selection
B.
Intersexual selection
Belding’s ground squirrels (Spermophilus beldingi) live in closely related groups. When they feed in the open, certain individuals (guard squirrels) watch for predators instead of feeding. The guard squirrels give an alarm call when a predator is sighted, allowing the rest of the group to run to safety. Researchers have noted that, because the alarm call draws attention to the guard, the guard is more likely to be caught by the predator and therefore has a lower survival rate in comparison with the other squirrels. Which of the following best explains the behavior of the guard squirrels?
a) The guard squirrels confuse the predator, lowering the predator’s success rate because the predator cannot tell which squirrel is producing the sound.
b) The behavior of the guard squirrels increases the survival of close relatives that share the genes of the guard squirrels.
c) Guard squirrels are typically females who have already reproduced, so they are no longer needed by the…
Chapter 35 Solutions
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