Current Affairs MCQs – Page 90 (Q891-900)

Robert Hooke, an English scientist and a contemporary rival of Isaac Newton, made major contributions to the study of elasticity, formulating what is now known as Hooke's Law, describing the proportional relationship between the force applied to a spring and the resulting deformation. He is also credited with coining the term cell in biology, after observing the compartmentalized structure of cork tissue under a microscope. Robert Boyle, Edmond Halley and John Flamsteed are tempting distractors, as each was another significant English scientist of a related era, though associated with different specific fields and discoveries. Hooke's long-running scientific and personal rivalry with Isaac Newton remains one of the most famous disputes in the history of science.

Edmond Halley, an English astronomer, successfully predicted the return of a comet that now bears his name, correctly calculating in 1705 that a comet observed in 1682 would return roughly every 76 years, a prediction later confirmed when the comet reappeared in 1758, well after Halley's own death. His accurate prediction provided strong supporting evidence for Isaac Newton's theory of universal gravitation, which Halley himself had encouraged Newton to formally publish. John Flamsteed, William Herschel and James Bradley are tempting distractors, as each was another significant English astronomer of a related era, though associated with different specific astronomical achievements. Halley's Comet remains one of the most famous and well-studied comets, visible from Earth roughly every 75 to 76 years.

William Herschel, a German-born British astronomer, discovered the planet Uranus in 1781, becoming the first person in recorded history to discover a planet previously unknown to ancient astronomers, using a powerful telescope he had built himself. His remarkable discovery instantly expanded the known boundaries of the solar system beyond Saturn, which had previously been considered the outermost planet. Tycho Brahe, Johannes Kepler and Christiaan Huygens are tempting distractors, as each was another significant earlier astronomer, though none discovered a new planet as Herschel did. Herschel initially proposed naming his newly discovered planet Georgium Sidus, in honor of Britain's King George III, though the name Uranus was eventually adopted internationally instead.

Gregor Mendel's laws of heredity, though initially largely overlooked and unrecognized during his own lifetime, laid the essential foundation for the modern science of genetics, established through his careful pea plant breeding experiments conducted at an Augustinian monastery during the 1850s and 1860s. His work identified fundamental patterns of dominant and recessive inheritance that remain central to genetics education today. Francis Galton, Thomas Hunt Morgan and Charles Darwin are tempting distractors, as each was another significant figure connected to the broader history of genetics or evolutionary theory, with Morgan later conducting influential genetic research using fruit flies decades after Mendel's own pioneering work. Mendel's groundbreaking findings were only widely rediscovered and appreciated by the scientific community around the turn of the 20th century.

Robert Peary, an American explorer, led the expedition officially credited with reaching the geographic North Pole overland by dogsled in April 1909, accompanied by his associate Matthew Henson and four Inuit guides. His claim has long been disputed by some historians due to lingering questions about the accuracy of his navigation and the physical feasibility of his reported travel speed across the polar ice. Richard Byrd, Roald Amundsen and Frederick Cook are tempting distractors, with Cook himself having controversially claimed to have reached the North Pole a year earlier, in 1908, though his claim was widely discredited. Matthew Henson, Peary's African American associate, is now increasingly recognized for his crucial role in the historic expedition's success.

John Dalton, an English chemist, developed atomic theory in the early 19th century, proposing that all matter is composed of extremely small, indivisible particles called atoms, and that atoms of different elements possess different, characteristic masses. His theoretical framework provided a crucial foundation for the subsequent development of modern chemistry as a rigorous, quantitative science. Joseph Priestley, Antoine Lavoisier and Humphry Davy are tempting distractors, as each was another significant chemist of a related era, though associated with different specific discoveries, respectively the isolation of oxygen, the law of conservation of mass and the electrochemical isolation of new elements. Dalton also suffered from red-green color blindness himself, a condition sometimes still referred to as Daltonism in his honor.

Humphry Davy, a British chemist, is credited with isolating and identifying several previously unknown chemical elements, including sodium and potassium, in 1807, using the then-novel technique of electrolysis to break down chemical compounds using electric current. His pioneering experimental work significantly expanded the periodic table known to chemists at the time. John Dalton, Joseph Priestley and Michael Faraday are tempting distractors, with Faraday notably having actually begun his own scientific career working as Davy's laboratory assistant before becoming an even more celebrated scientist in his own right. Davy also invented the Davy lamp, a significant safety innovation that helped reduce deadly explosions in coal mines.

John Cabot, an Italian explorer sailing on behalf of England under King Henry VII's sponsorship, is credited with the first European exploration of the North American mainland coast in 1497, landing somewhere along the coast of present-day Newfoundland or nearby Canadian territory. His voyage, though smaller in scale than Columbus's more famous expeditions, helped establish England's own early territorial claims in North America. Christopher Columbus, Amerigo Vespucci and Giovanni da Verrazzano are tempting distractors, as each was another significant early explorer of the Americas, though associated with different specific voyages and sponsoring nations. Cabot's expedition laid important groundwork for England's much later, more extensive colonization efforts in North America.

Samuel de Champlain, a French explorer, is credited with establishing the first permanent French settlement in North America, founding Quebec City in 1608 along the shores of the St. Lawrence River. His extensive explorations and diplomatic relationships with various Indigenous nations helped lay the essential foundation for the broader French colonial territory known as New France. Louis Jolliet, Rene-Robert de La Salle and Jacques Cartier are tempting distractors, as each was another significant French explorer of North America, with Cartier notably having explored the same general region decades earlier without establishing a permanent settlement himself. Champlain is often referred to as the Father of New France for his foundational role in early French colonization efforts.

Francis Galton, a British naturalist and geneticist, coined the term eugenics in 1883, an area of study he pioneered that advocated for improving human hereditary traits through selective breeding, an idea now widely and rightly condemned given its later, horrific misuse as a pseudo-scientific justification for forced sterilization and Nazi atrocities. He was also a half-cousin of Charles Darwin and was significantly influenced by Darwin's own theory of evolution. Thomas Huxley, Joseph Hooker and Alfred Russel Wallace are tempting distractors, as each was another significant figure connected to the broader Darwinian scientific circle, though none personally coined the term eugenics. Galton also made other, less controversial scientific contributions, including significant pioneering work in the fields of statistics and fingerprint analysis.