Select the incorrect statement about the contributions of scientists.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Miller created electric discharge in a closed flask containing CH4, H2S, N2 and water vapour at 800°C.
This question tests the chemical evolution of life: how the first organic molecules could have formed on the early earth.
(1) Branching descent and natural selection are the two key concepts of Darwinian theory of evolution. — Correct statement. Darwin’s theory rests on these two ideas.
(2) Hugo de Vries studied that mutation caused speciation, which was called saltation. — Correct statement. De Vries held that evolution happens through large, single-step mutations, which he called saltation.
(3) Miller created electric discharge in a closed flask containing CH4, H2S, N2 and water vapour at 800°C. — Incorrect statement. Miller’s flask held CH4, H2, NH3 and water vapour, not H2S and N2. He saw amino acids form.
(4) Oparin and Haldane proposed that the first form of life could have come from pre-existing non-living organic molecules. — Correct statement. This is their theory of chemical origin of life.
NCERT Extract:
Origin of Life – …
