scientist, discoveries & inventions MCQ section 4 MCQ Questions & Answers Detailed Explanation

Answer: (d)

Louis Pasteur is traditionally considered as the progenitor of modern immunology because of his studies in the late nineteenth century that popularized the germ theory of disease, and that introduced the hope that all infectious diseases could be prevented as well as treated by vaccination.

He developed immunization methods for chicken cholera and anthrax in animals and for human rabies.

Answer: (d)

William Ferrel was an American meteorologist, developed theories that explained the mid-latitude atmospheric circulation cell in detail. He demonstrated that it is the tendency of rising warm air, as it rotates due to the Coriolis effect, to pull in air from more southerly, warmer regions and transport it poleward.

It is this rotation that creates the complex curvatures in the frontal systems separating the cooler Arctic air to the north from the warmer continental tropical air to the south.

Answer: (c)

Answer: (c)

Answer: (a)

Answer: (b)

French physicist Henri Becquerel discovered radioactivity by accident in 1896 when a piece of uranium left in a dark desk drawer made an image on photographic plates.

The husband and wife team of Pierre and Marie Curie became interested in Becquerel’s discovery. While experimenting with their own uranium-containing ore, they came up with the term “radioactivity” to describe the spontaneous emissions that they studied.