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

Answer: (a)

Araneology is a branch of zoology that deals with the study of spiders. It is a branch of Arachnology, the scientific study of spiders and related animals such as scorpions, pseudo-scorpions, and harvestmen, collectively called arachnids.

Answer: (c)

Answer: (d)

The oral polio vaccine (OPV) was developed in 1961 by Albert Sabin. Also called “trivalent oral polio vaccine” or “Sabin vaccine”, OPV consists of a mixture of live, attenuated (weakened) poliovirus strains of all three poliovirus types.

OPV produces antibodies in the blood to all three types of poliovirus. In the event of infection, these antibodies protect against paralysis by preventing the spread of wild poliovirus to the nervous system.

Answer: (b)

Along with the surgeon Patrick Steptoe, Robert Edwards successfully pioneered conception through IVF, which led to the birth of Louise Brown in 1978. They founded the first IVF program for infertile patients and trained other scientists in their techniques.

Answer: (c)

Cement is a binder, a substance that sets and hardens independently, and can bind other materials together.

The word “cement” traces to the Romans, who used the term opus caementicium to describe masonry resembling modern concrete that was made from crushed rock with burnt lime as a binder.

Joseph Aspdin was a British cement manufacturer who obtained the patent for Portland cement on 21 October 1824.

Answer: (c)

The Beaufort scale is an empirical measure for describing wind velocity based on observed sea conditions. The scale was devised in 1805 by Irish-born Francis Beaufort (later Rear Admiral Sir Francis Beaufort), a Royal Navy officer, while serving in HMS Woolwich.