1. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

2. Who invented paper ?

Answer:

Cai Lun

3. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

4. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

5. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

6. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

7. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.