Question

Life cannot originate from inorganic material at present because of
A. Absence of raw material
B. Very low atmospheric temperature
C. High degree of environmental pollution
D. Very high amount of oxygen in atmosphere

Answer 1

Hint: Most of the scientists with however different theories of evolution do agree that life originated from inanimate matter abiogenecally which means without the interruption of living beings. The theory of chemical evolution is the nearest and the only one that provides an explanation for this evolution.

Complete answer:
We are well aware that our primitive atmosphere of earth was reducing in nature i.e. with less or no oxygen however was full of water vapour, carbon-di-oxide, carbon monoxide, nitrogen and hydrogen. U.V light, high temperature and lightning behaved as a source of energy for chemical reaction to cause between the primitive gases to form simple inorganic elements like water, ammonia, methane and cyanides.
Life cannot originate from inorganic materials at present due to the presence of high amounts of atmospheric oxygen in the environment. It happens because of the oxidising nature of the oxygen gas that oxidizes the inorganic materials in our atmosphere and thus becomes an obstacle in the chemical origin of life. The amount of environmental pollution has never been a problem in the origin of life.

From the above discussion it is clear that all the other options are baseless and option (D) is our right answer.

Note-
Oparin and Haldane in 1929, in reference to their hypothesis concluded that spontaneous generation of early molecules of the earth still has more reducing atmosphere as compared to the present oxidising atmosphere. They proposed that the first form of life arrived from the pre-existing non-living organic molecules.