Which of the following Statement(s) is / are correct?
A. Electron was discovered by J.J. Thomson
B. Theory of Electromagnetic radiation discovered by J.D. Watson
C. Theory of evolution by natural selection discovered by Charles Darwin
D. Anode rays discovered by Eugen Goldstein
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A, C and D only
A. Electron was discovered by J.J. Thomson Correct. J.J. Thomson discovered the electron in 1897 through his experiments with cathode rays.
B. Theory of Electromagnetic radiation discovered by J.D. Watson Incorrect. The electromagnetic theory was given by James Clerk Maxwell in the 1860s. J.D. Watson, with Francis Crick, proposed the double-helix structure of DNA in 1953.
C. Theory of evolution by natural selection discovered by Charles Darwin Correct. Darwin set out the theory in “On the Origin of Species” (1859); Alfred Russel Wallace reached the same idea independently.
D. Anode rays discovered by Eugen Goldstein Correct. Goldstein discovered the anode rays (canal rays) in 1886; this work later led to the discovery of the proton.