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Life and what are living organisms:
The inherent capacity of an organism to maintain and reproduce itself is known as life.
The organisms which have these capacities are known as living organisms.
Different types of living organisms
As we all know, the earth is the only planet on which a wide range of plant (flora) and animal (fauna) species are found.
The variation of life on earth is known as biodiversity.
All these living organisms possess different characters, show organisational and functional unity, and maintain a balanced relationship on earth.
All living organisms are made up of basic units of life called cells. In the course of time, all the simpler life forms evolved into complex life forms. The origin of life, and the gradual and slow changes that these life forms underwent, resulted in enormous biodiversity, which served as the foundation for evolution.
The two elements of the history of life include the origin of life on earth and the mechanism involved in the steady changes and adaptations of living organisms over time. This is known as the evolution of life.
Evolution of life
The process by which organisms evolve from earlier life forms and undergo changes over time is known as evolution.
According to the modern theory of evolution, evolution occurs by the inheritance of genes.
As discussed in heredity, the characteristics of an organism are attributed to the presence of specific genes. The presence of different alleles in different proportions brings about variations.