Exam 5: Macroevolution: Processes of Vertebrate and Mammalian Evolution

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Much of what we know about the history of life comes from studying fossils.

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The phyum chordate includes all animals with a never cord, gill slits, and supporting cord along the back.

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What are Monotremes?

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Cladistics is an approach to classification that makes evolutionary interpretations based solely on shared ancestral characters.

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What are structural similarities between species that are based on common function and not on common evolutionary descent called?

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The theory that macroevolution proceeds as the result of gradual microevolutionary change

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What does it mean to say that evolutionary processes can be both microevolution and macroevolution?

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Sexual dimorphism refers to reproductive differences among mammal species.

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When scientists assign fossil remains to genera and species, they must first assess the variation present in the fossil sample to determine its biological significance. What are the sources of morphological variation in fossil samples?

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Why is geographic isolation important to the process of speciation?

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Which two primary schools of classification are discussed in the text?

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What is the term for the ordering of organisms into categories, such as orders or families?

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Unlike a cladogram, a phylogenetic tree

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Cladistic analysis makes no attempt to discern ancestor-descendant relationships.

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In grouping organisms together in a cladistic classification, the most important characteristics are those that are

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A genus may be defined as a group of

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As discussed in the text, long-term continental drift had significant evolutionary ramifications because

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Define "species" and the biological species concept. Why is the latter the one preferred by most biologists?

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Contrast ancestral traits with derived traits.

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Endothermic animals include mammals and which of the following?

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