Darwin's Postulates

Aileen Ayala

Potencial for a specie to increase in number [by evolution]

Today, we have many species in our world that are who they are because of evolution, and there are many more to come (hopefully?). This depends a lot on their traits (shape, size, color in their eyes and fur). Also, other factors play in the roll for evolution to occur, such as the environment, predators and competition and us humans. Some people say that as evolution occurs, competition rises, could this be true?

Genetic Variation

Some specific traits from the species are passed on to their offsprings. Sexual reproduction must take place in order for species to continue to do their thing, and even though at some point mutations can be bad for a specie (the changes in DNA cells), it is indeed necessary of new generations to arise, which keeps supporting the theory of evolution! Perhaps, by those mutations the new species still have some traits that are similar to other organisms. Some species can live long enough to produce offsprings, others will produce more than others.


This is a HUGE and IMPORTANT factor in evolution of species. No matter of the habitat, competition is always around, and some of the species are the food of some. If there are not enough resources for all the population, then some species will find themselves in starvation, therefore they will not be able to reproduce OR their offsprings, and in some cases the specie can be find itself in extinction (I know, sad).

Proliferation of organisms that are able to reproduce and survive [in any given environment]

This is not about the species that are lucky, their way of reproducing and surviving is based on some heritable traits they have. By natural selection traits produce more offsprings than organisms that do not have (duh). The environment choses the species that will inherit those traits, that's why it's called natural selection.


Freeman, S., Quillin, K., & Allison, L. A. (2014). Biological science fifth edition. Harlow, UK: Pearson Education.

Nature Education. (2014). Genetic Mutation. Retrieved April 04, 2016, from http://www.nature.com/scitable/ebooks/genetic-variation-and-evolution-16553748/126455454#bookContentViewAreaDivID

About me

American School Foundation of Monterrey


Interest in Psychology