Exam I study guide

Exam I study guide - 1. Describe the correct sequence of...

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1. Describe the correct sequence of events in the origin 1. Abiotic synthesis of small organic molecules 2. Polymerization of small molecules into macromolecules 3. Packing of molecules into protocols (primitive cells) 4. Origin of self-replicating molecules (reproductive success) 2. The first genes on Earth were probably what? * RNA, because it has storage and catalytic properties 3. Describe the first radiometric means to determine the absolute age of fossils. 4. Approximately how far back in time does the fossil record extend? 5. What is the strongest evidence that prokaryotes evolved before eukaryotes? 6. What is the significance of fossilized stromatolites in the evolution of life on Earth? 7. The oxygen revolution changed Earth's environment dramatically. Which organisms took advantage of the presence of free oxygen in the oceans and atmosphere? 8. Which of the four steps in the evolution of life on Earth has not yet been accomplished by scientists studying the origin of life? 9. The legless condition that is observed in several groups of extant reptiles. How did this arise? 10. On what basis do the various taxonomic levels (namely genera, classes, etc.) of the hierarchal classification system differ from each other? * They go from broad to narrow (Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species) (Good King Phillip Came Over For Great Spaghetti) 11. What is homoplasy? Give examples of features in which the term is most applicable. * Homology is when organisms are simulate because of shared ancestry. Analogy (homoplasy) is when organisms are similar because on convergent evolution. Bat and bird wings are homologous as forelimbs, but analogous as functional wings. Anteaters and armadillos both have long tongues for eating ants. 12. What would you consider to be the best classification system? 13. How important are computers to computer software to modern cladistics? 14. When using a cladistic approach to systematics, what are the most important features for classification that should be studied? 15. What kind of evidence has recently made it necessary to assign the prokaryotes to either of two different domains, rather than assigning all prokaryotes to the same kingdoms. 16. Members of which kingdom (in Whittaker's 5-Kingdom classification) have cell walls and are heterotrophic? * The five kingdoms are Monera, Plantae, Protistae, Fungi, Animalia. A heterotrophic organism uses organic carbon for growth. The answer is Fungi. 17. Which kingdom has been replaced with two domains? * Monera. The two new domains are Bacteria and Archaea. 18. Describe Mycoplasmas. * Mycoplasmas are bacteria that lack a cell wall. Without a cell wall, they are unaffected by common antibiotics such as penicillin. 19. Describe bacterial cell walls.
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This note was uploaded on 12/04/2011 for the course BIO 200 taught by Professor Ejiofor during the Fall '11 term at TN State.

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Exam I study guide - 1. Describe the correct sequence of...

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