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Who invented the first successful typewriter?

  • (A) Christopher Latham Sholes
  • (B) Samuel Morse
  • (C) Charles Babbage
  • (D) Nikola Tesla

Answer: Christopher Latham Sholes

Christopher Latham Sholes invented the first practical typewriter, revolutionizing communication and writing.

Who developed the first modern theory of evolution?

  • (A) Charles Darwin
  • (B) Jean-Baptiste Lamarck
  • (C) Alfred Russel Wallace
  • (D) Gregor Mendel

Answer: Charles Darwin

Charles Darwin is known for developing the theory of evolution by natural selection, which remains a cornerstone of modern biology.

Who is known for developing the first theory of classical conditioning?

  • (A) B.F. Skinner
  • (B) Carl Rogers
  • (C) Ivan Pavlov
  • (D) Sigmund Freud

Answer: Ivan Pavlov

Ivan Pavlov developed the theory of classical conditioning, which shows how behaviors can be learned through association.

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Who discovered the nature of X-rays?

  • (A) Wilhelm Roentgen
  • (B) Marie Curie
  • (C) Albert Einstein
  • (D) Henri Becquerel

Answer: Wilhelm Roentgen

Wilhelm Roentgen discovered X-rays in 1895, which led to significant advancements in medical imaging.

Who is credited with discovering the law of universal gravitation?

  • (A) Isaac Newton
  • (B) Albert Einstein
  • (C) Johannes Kepler
  • (D) Galileo Galilei

Answer: Isaac Newton

Isaac Newton discovered the law of universal gravitation, which states that all objects are attracted to each other with a force proportional to their mass.

Who discovered the theory of evolution by natural selection?

  • (A) Gregor Mendel
  • (B) Alfred Russel Wallace
  • (C) Charles Darwin
  • (D) Jean-Baptiste Lamarck

Answer: Charles Darwin

Charles Darwin developed the theory of evolution by natural selection, explaining how species adapt to their environments over generations.

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Who is known for his contributions to the theory of electromagnetism?

  • (A) James Clerk Maxwell
  • (B) Michael Faraday
  • (C) Nikola Tesla
  • (D) Albert Einstein

Answer: James Clerk Maxwell

James Clerk Maxwell developed the theory of electromagnetism, which unified the study of electricity and magnetism.

Who is credited with inventing the first modern microscope?

  • (A) Antonie van Leeuwenhoek
  • (B) Robert Hooke
  • (C) Galileo Galilei
  • (D) Albert Einstein

Answer: Antonie van Leeuwenhoek

Antonie van Leeuwenhoek is credited with developing the first modern microscope, allowing the discovery of microorganisms.

Who is known for the theory of continental drift?

  • (A) Alfred Wegener
  • (B) Isaac Newton
  • (C) Albert Einstein
  • (D) Niels Bohr

Answer: Alfred Wegener

Alfred Wegener proposed the theory of continental drift, suggesting that continents were once joined and later drifted apart.

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Who is known for discovering the law of periodicity in the elements?

  • (A) Dmitri Mendeleev
  • (B) Marie Curie
  • (C) John Dalton
  • (D) Robert Hooke

Answer: Dmitri Mendeleev

Dmitri Mendeleev discovered the periodic law, which led to the creation of the periodic table.

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