Darwin and Evolution

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Across
  1. 5. the idea that a species changes over time
  2. 10. a type of selection where breeders could change a species by breeding it for certain traits
  3. 12. the study of geographic distribution
  4. 13. structures; different species that have similar structures
  5. 16. preserved remains of organisms
  6. 18. the _____ chooses in natural selection
  7. 19. a difference in a physical trait
  8. 20. a measure of the ability to survive and produce more offspring than other members of the population
Down
  1. 1. all living things descended from a common _____
  2. 2. Common ancestry is the idea that all species _____ from one species
  3. 3. the idea that one species can turn into new species
  4. 4. structures that appear to have no function
  5. 6. overproduction of offspring leads to ____ for resources
  6. 7. physical traits
  7. 8. structures that perform a similar function but are not similar in structure
  8. 9. a naturalist who proposed the idea of Evolution through Natural Selection
  9. 11. the change in a species over time
  10. 14. a group of organisms that are so similar they can breed
  11. 15. only ____ information is passed onto offspring
  12. 17. the idea that species could not change; they were ___