Erratic Random Impulsive Methodical

Darwin Antony van Leeuwenhoek Mendel Louis Pasteur

Pascal (Pa) Joule (J) Kelvin (k) Candela (cd)

0.1 mm 1 mm 10 mm 100 mm

Galileo Albert Einstein Isaac Newton None of these

Plague Cholera Malaria Typhoid Black Death: Bubonic plague was a deadly outbreak in the 14th century. It was caused by the bacterium Yersinia pestis, spread through fleas on rats. The disease killed an estimated 25–50 million people in Europe.

Cow Human Animals Rabbits

HPV HIV H5N1 HPS