scientist, discoveries & inventions MCQ section 4 Practice Questions Answers Test with Solutions & More Shortcuts

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: (b)

The theory that gases in the atmosphere might increase Planet Earth’s temperature was first postulated by Joseph Fourier in 1827, a scientist who also seems to have coined the term “greenhouse gases.”

But it wasn’t until 1896 that a research chemist by the name of Svante Arrhenius quantified the greenhouse gas theory and apparently coined the term “greenhouse effect.”

Answer: (c)

In 1970, American virologists Howard Martin Temin and David Baltimore along with Japanese virologist Satoshi Mizutani, working independently, reported the discovery of an enzyme that could synthesize proviral DNA from the RNA genome of RSV.

This enzyme was named RNA-directed DNA polymerase, commonly referred to as reverse transcriptase.