Inventors and Scientific Discoveries

Genetic linkage was first discovered by the British geneticists William Bateson, Edith Rebecca Saunders and Reginald Punnett.

Robert Hooke first observed and named 'cells' in 1665 while examining cork under a primitive microscope. He saw small box-like structures that reminded him of monks' cells. Schleiden and Schwann later formulated the cell theory, and Robert Brown discovered the nucleus.

Roger Bacon, a 13th-century English Franciscan friar, described the formula for gunpowder (saltpeter, charcoal, sulfur) in his 1267 work 'Opus Majus.' While gunpowder origins trace to 9th-century China, Bacon documented it in Europe. Colt and Gatting are 19th-century firearm inventors; C.V. Raman was a 20th-century physicist.

Otto Hahn (1879-1968) was a German chemist who discovered nuclear fission in 1938 with Fritz Strassmann. This discovery - splitting uranium atoms by bombarding them with neutrons - made atomic bombs possible. He won the 1944 Nobel Prize in Chemistry. While Hahn didn't build the bomb himself, his discovery enabled it.

The term 'gene' was coined by Wilhelm Johannsen (W.L. Johanssen) in 1909. He derived it from the Greek word 'genesis' meaning birth or origin. While Mendel discovered the principles of heredity, he didn't use the term 'gene'.

Lord Joseph Lister pioneered antiseptic surgery in the 1860s by using carbolic acid (phenol) to sterilize instruments and clean wounds, dramatically reducing infection rates and laying foundations for modern surgical practice.

Madame Curie (Marie Curie) is the only person to have won Nobel Prizes in two different scientific fields - Physics in 1903 (shared with her husband Pierre and Henri Becquerel) and Chemistry in 1911. Winston Churchill won one Nobel Prize in Literature. George Choupak is not a recognized Nobel laureate.

Fraenkel-Conrat and Singer separately conducted experiments with Tobacco Mosaic Virus (TMV) that demonstrated RNA carries genetic information by reconstituting infectious virus from its RNA and protein components.

Raphanobrassica is an intergeneric hybrid between radish (Raphanus) and cabbage (Brassica), first created by Russian cytologist G.D. Karpachenko in 1928. This demonstrated that distant plant species could hybridize, though the hybrid was typically sterile. The name commemorates his pioneering work in plant breeding and chromosome studies.

The Binet-Simon intelligence test was developed in 1905 by Alfred Binet and Theodore Simon at the request of the French government to identify school children needing special assistance. This pioneering work introduced the concept of mental age and formed the basis for modern intelligence testing. Lewis Terman later adapted it for American audiences as the Stanford-Binet test.

Marie Curie won the Nobel Prize twice - in Physics (1903) for her work on radiation phenomena and in Chemistry (1911) for discovering radium and polonium. Linus Pauling also won twice - the Nobel Prize in Chemistry (1954) for his work on chemical bonding and the Nobel Peace Prize (1962) for his campaign against nuclear weapons testing. They are among the very few individuals who have achieved this distinction.

Godfrey Hounsfield invented the CT (CAT) scanner in 1972 and shared the 1979 Nobel Prize. The name in option C appears to be a typo - it should be 'Godfrey' not 'Godjrey'. John Huxley (A), Bonnet Wright (B), and Williams Bond (D) are not associated with CT scanner invention.

William Einthoven invented the electrocardiograph (ECG) in the early 1900s and received the Nobel Prize in Physiology or Medicine in 1924 for this invention. The ECG records the electrical activity of the heart and is used to diagnose heart conditions.

William Harvey discovered blood circulation in 1628 and demonstrated that blood flows through the body in a continuous loop pumped by the heart. His work 'De Motu Cordis' established the circulatory system. William Roentgen discovered X-rays, and the other names are not associated with circulation discovery.

energy quanta was discovered by Max Planck