Biology crossword

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Across
  1. 2. was the first scientist to combine DNA molecules from two different organisms
  2. 4. determined the stricture of DNA with American biologist James Watson
  3. 5. Carson Ecologist who was also a writer and published a book called silent spring
  4. 7. investigated the effect of the location of genes
  5. 9. discovered a cure for diseases caused by microbes
  6. 11. Mexican American who traveled to Mexico to collect plants
  7. 12. British naturalist who traveled all over the world to study animals
  8. 13. studied plants and animals everywhere he went
Down
  1. 1. Greek philosopher who was a student of Aristotle's
  2. 3. published his findings that some microbes cause diseases
  3. 6. everything from blood to scrapings from his teeth
  4. 8. Canadian Botanist
  5. 10. made the greatest single contribution to the study of heredity