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AP Biology AP Biology Evolution

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					AP Biology
Evolution Unit, Selected Topics in Evolution
Reading Guide

                             SELECTED TOPICS IN EVOLUTION
                 (SEE CHAP 21, 53.6, 56.2 AND ATTACHED READINGS/VIDEO LINKS)
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SEXUAL SELECTION
http://evolution.berkeley.edu/evolibrary/article/0_0_0/evo_28
http://www.pbs.org/wgbh/evolution/library/01/6/l_016_09.html


1.      Why did the peacock’s tail give Darwin so much Angst?




2.      Sexual Selection works in two ways.      Describe each of these and identify what type of
interaction is going on here.
                                TYPE OF INTERACTION                   DESCRIPTION


      FEMALE CHOICE




     MALE COMPETITION




3.     Two hypotheses have been proposed for why female often choose ‘showy’ mates. Describe
each of these hypotheses below.




Be familiar with these Specific Examples:
    Peacock
    Cichlids (http://evolution.berkeley.edu/evolibrary/news/090301_cichlidspeciation)
COEVOLUTION
http://www.pbs.org/wgbh/evolution/library/01/3/l_013_07.html
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AP Biology
Evolution Unit, Selected Topics in Evolution
Reading Guide

http://evolution.berkeley.edu/evolibrary/article/0_0_0/evo_33

It is becoming increasingly recognized that pressure to adapt comes from interactions of various
populations.

4.     What must be demonstrated is occurring among the interacting populations for the changes to
be considered a case of coevolution? (See the Newt-Snake case study for more details.)




Explore the following examples of coevolution:

        Newt-Snake (http://evolution.berkeley.edu/evolibrary/article/biowarfare_01)
         Explain what is happening in this case. What type of interspecific interaction is driving this
         coevolution?



        Plant-Pollinators
         Explain what is happening in this case. What type of interspecific interaction is driving this
         coevolution?




        Parasitic interactions (http://www.pbs.org/wgbh/evolution/library/01/5/l_015_03.html)
         The Coevolution due to predator-prey and parasitic interactions is describe by the Red Queen
         Hypothesis.     We will revisit the Red Queen when we discuss the evolution of Sex next
         Semester.




5.      I was at the beach one day watching two boys build a sandcastle along the waters edge. They
were too close to the water, so each time they would get their sandcastle almost completed, the waves
would wash it away. Finally, one boy said to his friend ‘We continue to put in all this hard work for
nothing.’ Relate this concept to the effort (evolutionary speaking) a population of organisms must
exhibit for the species to exist.




SOCIAL BEHAVIOR AND EVOLUTON: ALTRUSIM AND KIN SELECTION

6.       Define and give an example of each of the following:
                                                  DESCRIPTION                  EXAMPLE
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                                         Page 2 of 3
AP Biology
Evolution Unit, Selected Topics in Evolution
Reading Guide



               ALTRUISM




            KIN SELECTION




        RECIPROCAL SELECTION




7.     Bottom line: Explain why any animal would place the good of its neighboors above its own
welfare?




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