studyqstest2 - Anthrbio161StudyQuestionsforMidtermExam2 1....

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Anthrbio 161 Study Questions for Midterm Exam 2 1. What is the difference between unicellular and multi-cellular organisms in terms of reproduction and variability? Unicellular organisms produce reproduce asexually by splitting and making copies of themselves. Multi-cellular organisms reproduce sexually and because of that are subject to phenotypic variation and evolutionary change. 2. What is "stratigraphy”? What are the major eras of geological time over which vertebrates have evolved? Stratigraphy is the location or position of fossil in relation to other buried layers which helps determine how old it is. 3. What four factors made possible the success of mammals when compared to dinosaurs and reptiles? Mammels have night vision, more efficient reproduction, have a complex central nervous system and are omnivorous. 4. What is the major functional implication of heterodontism? Describe the dental formula used to identify the earliest ancestor of primates, prosimians, New world monkeys, Old world
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studyqstest2 - Anthrbio161StudyQuestionsforMidtermExam2 1....

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