Evolution and Natural Selection

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Across
  1. 2. the struggle between organisms to survive in a habitat with limited resources
  2. 6. the process of grouping things based on their similarities
  3. 7. A technique used to determine which of two fossils is older
  4. 10. inherited characteristic that increases an organism's chance of survival
  5. 13. step by step approach to identify an organism using a series of paired descriptions
  6. 16. A technique used to determine the actual age of a fossil
  7. 17. A system for giving each organism a two-word scientific name that consists of the genus name followed by the species name
  8. 19. structures in different species that are similar because of common ancestry
  9. 20. the preserved remains or traces of an organism that lived in the past
Down
  1. 1. the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations
  2. 3. diagram that shows how scientists think different groups of organisms are related
  3. 4. a historical sequence of life indicated by fossils found in layers of the Earth's crust
  4. 5. change in a kind of organism over time; process by which modern organisms have descended from ancient organisms
  5. 8. structures, parts of different organisms with similar functions but have different evolutionary origins
  6. 9. an accidental change in a gene or chromosome that leads to a new trait
  7. 11. organisms produce more offspring than can survive
  8. 12. to change over time
  9. 14. The scientist who first proposed the Theory of Evolution by Natural Selection
  10. 15. species gradually change to respond to changing environment. Survival of the species. The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than less fit members of the same species.
  11. 18. type of reproductive isolation in which two populations are separated by geographic barriers like mountains or bodies of water