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Across 3. largest and most inclusive group in Linnaean classification 5. group of level of organization into which organisms are classified 7. study of diversity of life and the evolutionary relationships between organisms 9. trait that appears in recent parts of lineage, but not in older members 14. selective breeding of plants and animal to promote the occurrence of desirable traits in offspring 17. change overtime; the process by which organisms have descended from ancient organisms 18. in classification, group of similar genera 21. in classification, a group of closely related orders 22. heritable characteristics that increases an organisms ability to survive and reproduce in an environment 23. group that consists of a single ancestral species and all it descendants and excluded any organism that are not descended from that common ancestor 24. domain consisting of cell organisms that have a nucleus; includes protists, plants, fungi, and animals 25. preserved remains or traces of ancient organisms 26. domain of unicellular prokaryotes that have cell walls containing peptidoglycan; corresponds to the kingdom of eubacteria 27. in classification, a group of closely related classes 28. structures that are similar in different species of common ancestry

Down 1. how well an organism can survive and reproduce in its environment 2. larger, more inclusive taxonomic category than a kingdom 4. process by which organisms that are most suited to their environment survive and reproduce most successfully; survival of the fittest 6. in classification, group of closely related families 8. structure that is inherited from ancestors but has lost most of its original function 10. domain consisting of unicellular prokaryotes that have cell walls and do not contain peptidoglycan; corresponds to the kingdom Archaebacteria 11. body parts that share a common function, but not structure 12. classification system in which each species is assigned a two part scientific name 13. study of the past and present distribution of organisms 15. evolutionary branch of a cladogram that includes single ancestor and all its descendants 16. group of closely related species; the first part of the scientific name in binomial nomenclature 19. diagram depicting patterns of shared characteristics among species 20. the evolutionary history of a lineage