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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.

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.

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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.

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.

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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.

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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Who is credited with the discovery of the law of conservation of mass?

  • (A) Antoine Lavoisier
  • (B) Dmitri Mendeleev
  • (C) John Dalton
  • (D) Albert Einstein

Answer: Antoine Lavoisier

Antoine Lavoisier is known for the law of conservation of mass, stating that mass cannot be created or destroyed in a chemical reaction.

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