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Who developed the laws of heredity?

  • (A) Carl Linnaeus
  • (B) Charles Darwin
  • (C) Gregor Mendel
  • (D) Alfred Russel Wallace

Answer: Gregor Mendel

Gregor Mendel is known for his work on the laws of heredity, discovered through experiments with pea plants.

Who is credited with inventing the first successful airplane?

  • (A) Orville Wright
  • (B) Charles Lindbergh
  • (C) Wilbur Wright
  • (D) Amelia Earhart

Answer: Wilbur Wright

Wilbur Wright, along with his brother Orville, made the first successful powered flight in 1903.

Who discovered the theory of plate tectonics?

  • (A) Alfred Wegener
  • (B) Charles Lyell
  • (C) Isaac Newton
  • (D) Albert Einstein

Answer: Alfred Wegener

Alfred Wegener proposed the theory of plate tectonics, suggesting that Earths continents were once joined together.

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Who is known for developing the first vaccine for rabies?

  • (A) Louis Pasteur
  • (B) Edward Jenner
  • (C) Robert Koch
  • (D) Joseph Lister

Answer: Louis Pasteur

Louis Pasteur developed the first rabies vaccine in 1885, a major breakthrough in immunology.

Who discovered the electron microscope?

  • (A) Albert Einstein
  • (B) Max Planck
  • (C) Ernst Ruska
  • (D) Niels Bohr

Answer: Ernst Ruska

Ernst Ruska, in 1931, invented the electron microscope, allowing scientists to observe objects at a much higher resolution.

Who invented the first radio?

  • (A) Nikola Tesla
  • (B) Guglielmo Marconi
  • (C) Samuel Morse
  • (D) Heinrich Hertz

Answer: Guglielmo Marconi

Guglielmo Marconi invented the first practical radio, enabling wireless communication.

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Who is known for the invention of the first practical electric motor?

  • (A) Nikola Tesla
  • (B) Michael Faraday
  • (C) Thomas Edison
  • (D) Benjamin Franklin

Answer: Michael Faraday

Michael Faraday invented the first practical electric motor, contributing to the development of electromagnetism.

Who discovered the smallpox virus?

  • (A) Edward Jenner
  • (B) Louis Pasteur
  • (C) Robert Koch
  • (D) Joseph Lister

Answer: Robert Koch

Robert Koch is credited with discovering the smallpox virus and contributing to the development of its vaccine.

Who developed the first successful artificial heart?

  • (A) Christiaan Barnard
  • (B) Paul Winchell
  • (C) Michael DeBakey
  • (D) Norman Shumway

Answer: Paul Winchell

Paul Winchell developed the first successful artificial heart, which led to advancements in heart surgery and transplant technologies.

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Who proposed the heliocentric theory?

  • (A) Nicolaus Copernicus
  • (B) Johannes Kepler
  • (C) Isaac Newton
  • (D) Galileo Galilei

Answer: Nicolaus Copernicus

Nicolaus Copernicus proposed the heliocentric theory, suggesting that the Sun is at the center of the solar system.

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