6L14.2 Cell Theory - Origin of Germs

What was the widely accepted theory about the cause of diseases before the 1840s?

• Bacterial theory

• Virus theory

• Miasma theory

• Germ theory

What did early microscopes reveal that led to the skepticism of miasma theory?

• The presence of toxins in the air

• The existence of tiny microorganisms

• The existence of viruses

• The structure of human cells

What symptoms did Dr. John Snow observe in cholera-infected patients?

• Rashes and fever

• Severe vomiting and diarrhea

• Headaches and dizziness

• Coughing and sneezing

What did Dr. Snow recommend to stop the cholera outbreak in Soho?

• Burning contaminated clothes

• Distributing antibiotics

• Shutting down the Broad Street water pump

• Quarantining the infected

Why did Dr. Snow suggest that cholera was spread through a poison in the water?

• To gain support from other scientists

• To avoid panic among the public

• To align with the popular miasma theory

• To mislead the government officials

What evidence did Dr. Snow find that linked the Broad Street pump to the cholera outbreak?

• A widow who preferred the pump's water

• All of the above

• A workhouse with its own well

• An infant's dirty diapers near the pump

Why did city officials initially reject Dr. Snow's theory?

• All of the above

• They didn't want to admit human waste was in the water

• They thought cholera was airborne

• They believed in the miasma theory

Who vindicated Dr. Snow's efforts by isolating the cholera-causing bacterium?

• Edward Jenner

• Alexander Fleming

• Robert Koch

• Louis Pasteur

What major contribution did Louis Pasteur make to germ theory?

• Creating the first vaccines

• Developing the first antibiotics

• Discovering the structure of DNA

• Inventing the microscope

What is an important lesson from the shift from miasma theory to germ theory?

• Diseases are always caused by air

• Data-driven research is unnecessary

• Always trust traditional beliefs

• Scientific beliefs can change with new evidence