Scientific Discoveries and Inventions 18

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Across
  1. 1. "The study of the electrical properties of biological cells and tissues."
  2. 5. "The philosophical study of knowledge and its nature."
  3. 7. "The storage of biological material at very low temperatures."
  4. 9. "A line on a weather map connecting points of equal atmospheric pressure."
  5. 11. "The property of materials like iron to become magnetized."
  6. 13. "The study of the distribution of plants in relation to the Earth’s environment."
  7. 15. "The maintenance of stable internal conditions in an organism."
  8. 18. "The study of the microscopic structure of tissues."
  9. 19. "An organic compound consisting entirely of hydrogen and carbon."
  10. 20. "A technique used to introduce DNA into cells using high-velocity particles."
Down
  1. 2. "A recording of the electrical activity of the heart."
  2. 3. "A fundamental particle and a building block of protons and neutrons."
  3. 4. "The number and appearance of chromosomes in a cell nucleus."
  4. 6. "An instrument that measures light intensity at various wavelengths."
  5. 8. "The formation of new blood vessels in the body."
  6. 10. "The science of movement in living organisms."
  7. 12. "The measurement of the human body to understand physical variation."
  8. 14. "The process by which organisms maintain water balance in their cells."
  9. 16. "The branch of astronomy dealing with the measurement of stars' positions."
  10. 17. "The biological process that causes an organism to develop its shape."