(a) What is Goldilock zone for life?
(b) Explain chemical evolution of life.

Explanation

(i)This idea was developed by Oparin (1922) and haldane (1929).They proposed that with the conditions prevailing on earth, life arose by a series of sequential chemical reactions.
(ii)The first of life could have come from pre-existing non-living inorganic molecules which gave rise to formation of diverse organic molecules which are transformed into colloid system to produce life.
(iii)The modren concept on chemical evolution regarding origin of life was accepted.