Darwin's four postulates
Ana Sofia Maldonado Villarreal
Variation - There is a lot of variety within a species
Inheritance - Offspring look like their parents
Darwin's theory of natural selection stated that evolution depends on the existence of heritable variability within a species to allow the generating of differences between ancestral and descendant populations. We can currently see and talk about inheritance everyday, we connect our lives with the ideas that Darwin left behind. For example, it is clear that my brother and me look alike, and we both have similar traits from our parents, this is an great example of inheritance and the ideas of Darwin are clearly proven.
Differential Survival - External conditions can affect survival
Differential survival is an essential component of Charles Darwin’s theory of natural selection, the idea that the environment is in charge of selecting (all through random chance) which individuals successfully can leave the offspring for the next generation, this is mostly called the “Survival of the Fittest”.
Extinction - Some traits are not suited to survival and those with them will die out.
Extinction is part of Darwin's theory of evolution, and it explains how species of living things have changed over time. This theory is fully supported by fossils and by the changes that have been seen in microorganism and bacteria. Darwin believes and talked about how extinction is necessary for evolutionary change. He believed that the idea of improvement with the idea of natural selection changed our valuation of extinction for good.
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