Natural Selection and Biodiversity

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Across
  1. 3. organisms introduced into new areas that multiply quickly
  2. 5. nitrogenous base that matches with thymine
  3. 6. structure in a cell where proteins are made
  4. 7. when houses buildings and agriculture reduce natural environments
  5. 11. overexploitation can be caused by this
  6. 16. variations in _____ cause genetic diversity
  7. 17. elimination of all the members of a species from Earth
  8. 19. twisted structure of DNA
  9. 20. a place in the oceans with great biodiversity
  10. 21. the scientist that proposed the idea of natural selection
  11. 22. sugar molecule found in the backbone of DNA
Down
  1. 1. birds that Darwin observed in the Galapagos islands
  2. 2. Darwin proposed the theory of _____
  3. 4. insect species that changed color when tree bark changed due to burning coal
  4. 8. animal with a shell that Darwin observed on the Galapagos islands
  5. 9. nitrogenous base that matches with cytosine
  6. 10. place on Earth with the greatest diversity
  7. 12. what caused the color of the tree bark to change where peppered moths lived
  8. 13. when coloring and patterns allow an organism to blend in with their surroundings
  9. 14. the number of nitrogenous base pairs needed to form a codon
  10. 15. structure in a cell that holds DNA
  11. 18. cell part that contains DNA