Charles Darwin’s theory of evolution states that evolution happens by natural selection.
Individuals in a species show variation in physical characteristics. This variation is because of differences in their genes.
Individuals with characteristics best suited to their environment are more likely to survive, finding food, avoiding predators and resisting disease.
These individuals are more likely to reproduce and pass their genes on to their children. Individuals that are poorly adapted to their environment are less likely to survive and reproduce. Therefore, their genes are less likely to be passed on to the next generation.
As a consequence, those individuals most suited to their environment survive and, given enough time, the species will gradually evolve.
The four key points of Darwin's Theory of Evolution are: individuals of a species are not identical; traits are passed from generation to generation; more offspring are born than can survive; and only the survivors of the competition for resources will reproduce.
5 янв 2022
