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StudyQuesMT - STUDY QUESTIONS GE 70B(before midterm 1...

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STUDY QUESTIONS GE 70B (before midterm) 1. Explain why it can be said that the fossil record is constantly improving. 2. List and briefly explain some controls on the physical form of fossils (both pre- and post- death influences). 3. What kinds of information can trace fossils give you? Provide some examples. 4. Define biological evolution and explain why it makes perfect sense that biological evolution should occur based on what we know of living organisms. 5. Explain the difference between analogy and homology. Why do analogous structures occur so commonly? 6. Which characters are homologous between all living organisms on Earth? 7. Explain how embryology provides evidence for biological evolution. What other lines of evidence support this theory/fact. 8. How does natural selection work? 9. What is an adaptation? Provide some examples. 10. What is sexual selection and how does it work to produce differences between the genders of many animal species? Why doesn’t runaway sexual selection occur? (e.g., producing peacocks with outrageously long tail feathers) 11. Explain how the fossil record provides clear (not contradictory) evidence for evolution. 12. How do vestigial structures (like the appendix in us) provide evidence for evolution? 13. What are the sources of variation between individuals of the same species? 14. What advantage to a species does variation provide? If this variation is said to be random, how is it that evolution has produced such organized species? 15. How are proteins made from the DNA code? 16. What is the Cambrian period, and why is this particular time period significant to the study of evolution? 17. What triggers have been proposed for the Cambrian explosion of animals? Could the real trigger have been a combination of these factors and some we have not yet identified?
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