Evolution and Natural Selection

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Across
  1. 2. a structural modification made to the body
  2. 7. independent evolution of similar features in a species
  3. 9. a microorganism that infects cells; it causes illness and disease
  4. 10. the reduction of genomic variability
  5. 11. cells that have a nucleus
  6. 13. species with the same ancestry become more distinct because of evolutionary changes
  7. 17. when associated species influence each others' evolution
  8. 18. large group of single-celled organisms
  9. 19. cells that lack a nucleus
  10. 20. the study of embryos and their development
Down
  1. 1. organisms that can adapt to their environment survive; organisms that don't adapt die
  2. 3. extreme genetic drift when population size is extremely low
  3. 4. transfer of genetic material from one population to another
  4. 5. behavioral change in response to something
  5. 6. a specific pattern in a gene
  6. 8. creation of offspring through two parents
  7. 12. creation of offspring through a single parent
  8. 14. a species of organisms dying out
  9. 15. asexual reproduction by the splitting of one cell to make two cells
  10. 16. random change of an existing gene variant