chapter 14 - Chapter 14 Notes Objectives Explain how an...

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Chapter 14 Notes Objectives Explain how an asteroid could have caused a mass extinction that included the death of dinosaurs. Describe the evidence that supports this hypothesis. Describe the processes included in the study of macroevolution. Distinguish between nonbranching and branching evolution. Define the biological and evolutionary species concept. Explain limitations when applied to all types of living organisms. Describe the different types of pre-zygotic and post-zygotic reproductive isolating mechanisms. Distinguish between allopatric and sympatric speciation. Describe the gradualistic and punctuated equilibrium model of evolution. Relate a ―sudden‖ geological appearance to our ―human‖ sense of time. Explain the concept of exaptation and describe several examples. Explain how paedomorphosis can create new species. Describe some of the paedomorphic traits of humans. Explain how analyzing sedimentary rock layers and radiometric dating help us understand the fossil history of life on Earth. Explain how the formation and break up of the supercontinent Pangaea affected the evolution of life on Earth. Describe the theories to explain the mass extinction 65 million years ago, and explain why mass extinctions can be seen as times of great opportunity. Distinguish between taxonomy and systematics. Explain how the binomial system is used to identify species. Finally, list the levels of taxonomic groups beginning with species and ending at kingdom. Explain how homologies are used to create classification systems. Distinguish between homologous and analogous structures. Explain how convergent evolution can make interpreting homologies difficult. Distinguish between the two-kingdom, five-kingdom, and three-domain systems of classification. Explain why classification systems are revised. In the previous chapter, the major focus of the material was the process of microevolution. If you recall, microevolution is the change of allele frequencies within a population. Without microevolution, macroevolution will not take place. Macroevolution differs from microevolution in a number of ways included the amount of time and the possibility of decreased documentation. In addition, macroevolution focuses on the process of speciation. In this chapter you will be introduced to a number of processes responsible for the evolution of new species as well as processes that keep species separate.
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What happened to the dinosaurs? I. Biology and Society: One Troublesome Species or Two? - Review opening essay about the different mosquito species and the West Nile Virus. - Be able to explain why the WNV is more prominent in North America than Europe. II. The Impact of Asteroids
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This note was uploaded on 04/05/2012 for the course BIO 102 taught by Professor Larson during the Spring '12 term at Jefferson College.

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chapter 14 - Chapter 14 Notes Objectives Explain how an...

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