Direction: Answer the following questions after reading this passage:
By the beginning of the twentieth century, doctors knew that many diseases were caused by living microbes. They knew about immunisation and vaccines. Thanks to the efforts of scientists like Jenner, Pasteur, Koch and Ehrlich Lister, it had taught them the value of antiseptics. Known chemical disinfectants, such as carbolic acid, would kill germs, but they would also injure cell tissues. How could harmful microbes be destroyed without, at the same time, injuring body tissues? In 1900, to a shipping clerk- Alexander Fleming--a career in science seemed like distant dream. Alexander was born on August 6, 1881, the youngest son of an Ayrshire, Scottish farmer. He was able to complete high school but then his family's funds ran out. At sixteen, he took a job as a shipping clerk and stayed there for four years. In 1901, Alexander came into a small legacy which enabled him to continue his education, and on the advice of one of his brothers, who was a doctor, he chose to prepare for a career in medicine. Alexander did unusually well in medical school along with rifle shooting, swimming, water polo and painting. After his graduation, his teacher Prof. Wright asked him to join him in bacteriological research, which he readily agreed.
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