Natural Selection

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Across
  1. 6. species has died out
  2. 7. organisms who are better adapted will survive
  3. 9. two parents needed
  4. 11. reduction in genetic variation
  5. 12. change in genetic variation frequency
  6. 13. single cell organism
  7. 15. formation of new species
  8. 16. versions of a gene
  9. 17. organism splits in half to reproduce
  10. 18. changing to adjust to environment
  11. 20. one parent needed
Down
  1. 1. event that causes population decrease
  2. 2. amount of different phenotypes
  3. 3. has a nucleus
  4. 4. no nucleus
  5. 5. bacteria form a resistance to antibiotics
  6. 8. difference in DNA among species
  7. 10. movement of genes in and out a population
  8. 14. production of offspring
  9. 19. difference in phenotype