what light these throw on organic evolution
Answers
"Origin of Species" is a work of scientific literature by Charles Darwin. It was published on 24 November 1859. It throws the light on variations caused during evolution which leads to natural selection for the survival. Evolution brings a remarkable change in the morphology, anatomy and genetics of a living organism which helps them to adjust in a better manner in the environment and coordinate with the fluctuating conditions with time. These changes create variations generation after generation. Natural selection is Darwin's most famous theory. It states that evolutionary change comes through the production of variation in each generation and differential survival of individuals with different combinations of these variable characters. Individuals with characteristics which increase their probability of survival will have more opportunities to reproduce and their offspring will also benefit from the heritable, advantageous character. So, over time these variants will spread through the population. Descent with modification refers to the passing on of traits from parent organisms to their offspring. This passing on of traits is known as heredity and the basic unit of heredity is the gene. Darwin presents about descent with modification and natural selection in his book The origin of species.