scientist, discoveries & inventions MCQ section 1 MCQ Questions & Answers Detailed Explanation

Answer: (a)

Answer: (b)

John Logy Baird demonstrated the first television on 26 January 1926, Alexander Fleming discovered penicillin in 1928, Telecast of talking pictures on television by BBC took place on 2 July 1967, Jonas E. Salk developed the first polio vaccine in 1952.

John Logie Baird was born on 14 August 1888 in Helensburgh on the west coast of Scotland, the son of a clergyman. In 1929, the German post office gave him the facilities to develop an experimental television service based on his mechanical system, the only one operable at the time.

Sound and vision were initially sent alternately and only began to be transmitted simultaneously from 1930.

Answer: (b)

Frederick Banting was a Canadian medical scientist, doctor and Nobel laureate noted as one of the main discoverers of insulin.

In 1923 Banting and John James Rickard Macleod received the Nobel Prize in Medicine, becoming the youngest recipient of the Nobel Prize in Physiology/Medicine to date.

Answer: (b)

The concept of stored-program seals with storage of instructions in computer memory to enable it to perform a variety of tasks in sequence or intermittently. The idea was introduced in the late 1940s by John von Neumann.

Answer: (c)

Entomology is the scientific study of insects, a branch of zoology. Like several of the other fields that are categorized within zoology, entomology is a taxon-based category.

At some 1.3 million described species, insects account for more than two-thirds of all known organisms.

Answer: (b)

A lysimeter is used to measure the amount of actual evapotranspiration which is released by plants. By recording the amount of precipitation that an area receives and the amount lost through the soil, the amount of water lost to evapotranspiration can be calculated.