Question

Write an essay on the origin of life.

Answer 1

Origin of life is the origin of living beings on earth. The theory of biochemical origin had been experimentally supported by Urey and Miller.

Complete answer: The original the first life form has been an intriguing concept for many years. Different theories and experimental proof were forwarded by a different scientist during the time interval some of the stories were rejected as they fail to provide enough evidence while some others were accepted.

However, there is no theory that could provide a complete view of the origin of life.
The theory of special creation suggests that all the living forms were created as it is by God.
The theory of spontaneous generation suggests for the origin of living forms from the nonliving or inanimate objects.
The theory of panspermia proposed that life reaches the earth from other cosmic bodies.
The theory of biochemical evolution was suggested by Oparin and Haldane.
The theory suggested that primitive earth was reducing in nature due to the absence of oxygen and several chemicals condensed together in oceans warmed by temperature formed primordial soup in which the first living cell took its form.
Several amino acids, nucleic acids, and sugar with other organic and inorganic molecules together formed coacervate that was capable of absorbing water and nutrients and perform building. This kept on uniting with more and more molecules and form the first living cell.

Note: The organic compounds formed in Urey and Miller experiment were amino acids. The developed primitive earth like condition by providing lightning, water vapors, and inorganic molecules and obtain the organic molecules.