Arrange the following theories of evolution in correct chronological sequence
A. Biogenesis theory
B. Big Bang Theory
C. Panspermia Theory
D. Modern theory of evolution
Choose the correct sequence of theories of evolution of life on earth from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → B, C, A, D
B. Big Bang Theory — first. It explains the origin of the universe itself by a single huge explosion. The universe then expanded and cooled, and the galaxies and the earth were formed. This had to come before any life.
C. Panspermia Theory — second. It suggests that life came to the earth from outer space, as units of life called spores carried to different planets. Early Greek thinkers held this idea.
A. Biogenesis theory — third. Louis Pasteur showed by careful experiments that life comes only from pre-existing life. This ended the old belief in spontaneous generation, which said that life came out of decaying matter.
D. Modern theory of evolution — last. It explains how living forms changed over time. It builds on Darwin’s natural selection and adds variation through mutation and recombination.