Evolution in biology means change in the heritable characteristics of biological populations over successive generation. Evolution is cause due to change in genetic composition of a population over successive generations, which can be caused by natural selection, mutation, inbreeding or hybridization. Throughout the lives of the individuals, their genomes interact with their environment to cause variations in traits.
Natural selection acts on the phenotype, the characteristics of organism which actually interact with the environment, but the genetic basis of any phenotype that gives that phenotype a reproductive advantage may become more common in population. The first modern ethologist was Charles Darwin, whose book “the expression of the emotions of human and animals” influenced many ethologists. Darwin viewed each species of living things in a “struggle for survival” within its natural environment. He viewed the natural environment in terms of risks and opportunity for survival. According to him, only those members of species with the most adaptive traits would be likely to live long enough to reproduce and pass these traits to new generations.
Evolution help species to survive and pass on their new generation. Species learn to it’s environment and survive. With evolution, new generation of species will be more advance with new features. It might take years, decades or just few days, but evolution will always give to birth to new and improved species.
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