1. Bacteria   Henry Cavendish   Enrico Fermi   Anton Von Leeuwenhock   Alexander Fleming   Hint Half-n-half Clue   2. Oxygen   Karl Wilheim Scheele   Hans Christian   Michael Faraday   Euclid   Half-n-half Clue   3. Malaria is carried by mosquitoes   Anton Von Leeuwenhock   Ronald Ross   Henry Cavendish   Gregor Mendel   Half-n-half Clue   4. Potassium   Gregor Mendel   Louis Pasteur   Wilhelm K. Roentgen   Sir Humphry Davy   Half-n-half Clue   5. Laws of Heredity   Enrico Fermi   Gregor Mendel   Charles Darwin   Albert Einstein   Half-n-half Clue   6. X-rays   Wilhelm K. Roentgen   Alexander Fleming   Christian Barnard   Neels H. D. Bohr   Half-n-half Clue   7. Calcium   Hans Christian   Karl Wilheim Scheele   Sir Humphry Davy   Sir J. J. Thompson   Half-n-half Clue