Scientific Discoveries and Inventions 24

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Across
  1. 2. "The study of the interrelationship between an organism’s physiology and its environment."
  2. 4. "A technique for introducing DNA into cells using high-velocity particles."
  3. 6. "A landscaping method that reduces water use, often with drought-resistant plants."
  4. 9. "A type of cell lacking a nucleus, found in bacteria and archaea."
  5. 10. "The benefits humans obtain from ecosystems, like clean water and air."
  6. 12. "The study of life possibilities beyond Earth."
  7. 13. "A process that separates components by spinning them at high speeds."
  8. 16. "A method to record the electrical activity of the heart."
  9. 18. "The application of nanotechnology for medical purposes."
  10. 19. "An increased reaction of the skin to sunlight."
  11. 20. "The study of evolutionary relationships among biological species."
Down
  1. 1. "A treatment that uses the body's immune system to fight diseases."
  2. 3. "The study of biological rhythms and cycles."
  3. 5. "The ability of a material to interact with living tissue without causing harm."
  4. 7. "The process of heat production in organisms."
  5. 8. "The building block of proteins, essential for biological functions."
  6. 11. "The study of the Earth's chemical composition and processes."
  7. 14. "The study of the distribution of species and ecosystems in geographic space."
  8. 15. "The study of how drugs move through the body."
  9. 17. "A renewable biofuel derived from vegetable oils or animal fats."