Darwin 4 Postulates

By: Andres Barrera


There are many different species in the world but each species also has a variation of species. Such as the bears there are black bears, brown bears, polar bears and many other kinds. Although they may look the same they differ from each other because of the environments each one lives in. Variation includes differences in: size, color, strength, climate adjustment, fur length and many other things that enables each different bear to be able to survive in there own environment. Evolution has been in charge of giving these different traits to the variety of every species to adopt to the environment they have to survive in.



Although the offsprings present many similar traits from their parents because they are inherited there might be some changes depending on the traits of both parents. The skin or fur color might make a mix if the parents skin or fur are different. But if both parents are short there will be a very high chance that the offspring will be short as well. The probabilities change in every parent's case depending on both traits specifically the differences.

Differential Survival

This is also known as Natural Selection depends on the environment, food resources and other survival mechanisms in animals. If one specific type of species lets say green beetle is unable to camouflage from predators because of its color and the brown beetle is able to then as time goes by the better adapted beetle will produce faster. The green beetle will produce slower and eventually may no longer last enough to reproduce.


This is mostly based on time, climate change and predator's evolution or human disturbance. As time advances some animals or species are used to eat or live in a specific place and with one natural disaster the species might get extinct. Climate change during the long run might affect the survival of a species and not allow to adapt the climate so they end up dying. Lastly humans have been guilty of making many species go extinct or close to because of extensive killing or destroying natural habitats. Leaving no place for the animals to live so they end up getting extinct.


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