Questions in the-living-world

Select	Question
	Formation of which complex molecules was noticed by Urey and Miller when they subjected substances like $N{H_3},C{H_4},{H_2}O$ etc. to electric discharge
	According to Oparin, life originated as
	'Origin of life' was written by
	'Origin of life' as a result of chemical evolution has been properly explained by
	The most vital process for the existence of life on earth is
	The four elements that make up 99% of all elements found in a living system are
	Which one of the following is the correct sequence of chemical substances produced during the origin of life on the earth
	Which is responsible for origin of life
	Life originated in
	Origin of life took place in/on