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

Answer: (b)

The ABO blood group system is widely credited to have been discovered by the Austrian scientist Karl Landsteiner, who identified the O, A, and B blood types in 1900. He was awarded the Nobel Prize in Physiology or Medicine in 1930 for his work.

Answer: (c)

Though Gregor Mendel (1822–1884) first suggested the existence of discrete inheritable units, he did not use the term gene.

Gene was coined in 1909 by Danish botanist Wilhelm Johannsen to describe the fundamental physical and functional unit of heredity. The related word genetics was first used by William Bateson in 1905.

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.

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: (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.