Question

Assertion (A) Theory o f chemical evolution proposed that life came from pre-existing non-living organic molecules.
Reason (R) Primitive earth conditions led to the production o f organic molecules.

• A. If both A and R are true and R is the correct explanation of A
• B. If both A and R are true, but R is not the correct explanation of A
• C. If A is true, but R is false
• D. If A is false, but R is true

Answer 1

Answer: (A)

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Theory of chemical evolution states that life originated from pre-existing non-living organic molecules and the formation of life was preceded by chemical evolution. The conditions on primitive earth which favoured chemical evolution were high temperature $\left(4800^{\circ} C \right)$, volcanic storms and a reducing atmosphere that contained $CH _{4}, NH _{3}$, water vapours, etc.