Question

The origin of life, book was written by
a. Darwin
b. Oparin
c. Gray
d. Smith

Answer 1

Evolution is the basics of life. Everyone develops with time and learns new things. To start with the new generation is becoming smarter than the parents due to the privileges provided. The species can adjust to every condition prevailing and can survive this has become the actual form of evolution. With time species have accommodated the changes of environment and other factors to adjust and survive.

Complete answer:
The origin of life with different life forms have been described in the theory of the book’ the origin of life’.

Smith proposed the Clay hypothesis which describes the process of origin of life to come from non-living particles to living entities. His book is entitled the ‘Seven clues to the origin of life’.

Grey and his colleagues explained the theory of the evolution of eukaryotic cell organelles such as mitochondria and chloroplast.

Darwin proposed the theory of natural selection which describes the evolution of life forms. He wrote a book called ‘the origin of species’ which explains how life adjusts and accommodates itself to different environmental conditions and exists.

Once the theory of the spontaneous origin of life was reputed, Oparin and Haldane both scientists made a significant contribution describing the process of life. Chemical evolution which refers to the origin of life through organic molecules is the concept that Oparin and Haldane put forward.

According to them, simple organic molecules such as sugars, amino acids and nucleotides spontaneously form raw material present in primitive Earth. The reducing atmosphere of the earth supported the chemical evolution that gives rise to life. They described the concept of chemical origin and evolution of life in his book called ‘the origin of life’.

Hence, the correct answer is option (B).

Note: Biochemical origin of life was proposed by Oparin and Haldane, which cannot occur on present-day Earth.
This is due to the presence of a significant amount of free oxygen molecules in the atmosphere which means there is no reducing atmosphere provided for the conditions.
The presence of oxygen indicates an oxidative atmosphere and for the origin of life according to the theory of Haldane and Oparin, a reducing atmosphere is required for spontaneous evolution.