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Chapter 17 Review Worksheet 1. Aristotle classified plants on the basis of differences in their ____________________. 2. The science of naming and classifying organisms is called ____________________. 3. ____________________ devised the two-name system of naming organisms. 4. Biologists of Linnaeus’s time classified every living thing as either plant or ____________________. 5. A genus is subdivided into smaller groups called ____________________. 6. Each kind of organism on Earth is assigned a unique two-word ____________________. 7. All scientific names are made up of two words that are often derived from the ____________________ language. 8. The first word of a scientific name indicates the ____________________ to which the organism belongs. 9. A kingdom is divided into phyla when animals are being classified or into ____________________ when plants are being classified. 10. The evolutionary history of a species is called its ____________________. 11. Refer to the illustration above. Organism 4 belongs to the kingdom ____________________. 12. Eukaryotic organisms that lack specialized tissue systems are members of the kingdom ____________________. 13. Corals, spiders, and rodents all belong to the kingdom ____________________. 14. The domains of the three-domain system of classification are Archaea, Bacteria, and ____________________. 15. The variety of organisms at all taxonomic levels is called ____________________. 16. Cladistics uses shared and ____________________ characters to group taxa. 17. The Greek philosopher ____________________ classified organisms as either plants or animals.