Question

The concept of chemical evolution is based on
A. Crystallization of chemicals
B. Interaction of water, air, and clay under intense heat
C. Effect of solar radiation on chemicals
D. Possible origin of life by the combination of chemicals under suitable environmental conditions

Answer 1

The concept of chemical evolution refers to the origin of life from nonliving matter. The first organic compound was formed by the reactions of inorganic compounds under the changing of environmental conditions.

Complete answer
The first step in the development of life on this planet is the formation of complex organic molecules from the permutation and combination of simpler inorganic molecules through chemical reactions in the oceans. The chemical evolution takes place in less than a billion years.
Chemical evolution can be referred to as the following:
Abiogenesis – it is the transition from nonliving elements to living systems.
Astrochemistry deals with the study of the abundance and reactions of different inorganic molecules of the environment of the earth and their interaction with radiation.
Cosmochemistry deals with the study of the chemical compositions and the formation process of those compounds that are present in the universe.
Evolution of metal ions that plays a key role in biochemical reactions of biological systems.
Evolution of gases, a process of gas bubbling out from a solution.
Molecular evolution - the evolution of nucleic acids, amino acids, etc.
Evolution of Oxygen evolution - the process of generating molecular oxygen through a chemical reaction which is the pioneer element for keeping the lives on the planet.
Stellar nucleosynthesis - the creation of chemical elements by stellar thermonuclear fusion.

Thus, the correct answer is option D. Possible origin of life by the combination of chemicals under suitable environmental conditions.

Note: The modern theory of chemical evolution is predicated on the basis of the idea that on the primitive earth a mix of simple chemicals accumulated to form more complex molecular systems, from which, the primary functioning cell(s) arose.