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I. Living Things A. Classifying Organisms 1. Why Do Scientists Classify? a) for organization, since there are at least 1. ________________ kinds of organisms on Earth b) classification: the process of grouping things based on their 2. ________________ c) many scientists, like biologists, geologists, etc. use classification d) the scientific study of how living things are classified is called 3. _______________ 2. Early Classification Systems __________________________________________ __________________________________________ __________________________________________ 3. The Classification of Linnaeus a) expanded Aristotle’s idea of classification b) Linnaeus’ system was called 4. ________________________ c) the first part of the name, 5. __________ groups closely related organisms d) the second part of the name, species groups closely related organisms that can mate and produce 6. ________________________ e) in this system, the name of the organism is in Latin and is italicized f) the 7.____________________ is capitalized and the 8. ____________ is lowercase 4. Levels of Classification a) The Seven Levels of Classification 1) the seven levels of the classification system used today (broad to specific): 9._______________________________ ________________________________ b) Classifying an Owl 1) the owl Bubo virginianus, Bubo is the 10. ____________ 5. Evolution and Classification ____________________________________ ____________________________________ ____________________________________ 6. Classification Today a) scientists understand that certain organisms are similar because they share a 11. ____________________ b) homologous structures provide evidence that species with similar evolutionary histories are classified 12. _______________ c) primarily, scientists rely on the comparison of 13. _______________ between organisms to determine evolutionary history 7. Using the Classification System a) field guides are great tools for classification b) another useful tool is the 14.___________, a series of paired statements that describe what a particular organism looks like