Darwin's Four Postulates

Regina Schwarz P.3

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Who was Charles Darwin?

Charles was born on February 12, 1809 he studied to become a ver famous scientist and biologist. During his career he developed the theory of evolution, with new ideas that no one had before him. Darwin used the four postulates to explain biological change. His most famous work he ever did was The Origin of Species by Means of Natural Selection, he published it even though he knew it was not finished. After his death on April 18, 1882 his works stayed in the earth still being studies more than after 200 years later. Darwin really was a big influence in the science field, even though he never got to understand evolution, just knowing that it changed some how. Today's scientists look up to Darwin because they still do no understand how his theories were so accurate without any technology.

Postulate One

Darwin stated in postulate one that "individual organisms can vary in the traits they possess, such as their size and shape". Meaning, that individuals within species may vary, for example variations in color, sex, height, race, etc. Below I used a picture of a few different kinds of dogs, which vary a lot in their traits and race but they are all the same species, all of the are dogs.

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Postulate Two

The second postulate Darwin said that "Some of the trait differences are heritable, meaning that they are passed on to an offspring". In other words, meaning that some traits are passed on from generation to generation. Like the picture below of four generations of women that have similar traits, which means that they have been passed on from one to another during the years.

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Postulate Three

In the third postulate Darwin said that "In each generation, more offsprings are being produces that can possible survive. Most of the time, some individuals in a population can survive long enough to produce offsprings. Among the individuals that can produce offsprings, some will produce more than the other individuals." Darwin meant that more offsprings are produces that the ones who can survive; individuals that survive and the ones who reproduce are those that are best suited for the environment, the ones who will survive. In the picture below there are two animals fighting each other, these were the two animals that were the fittest that survived.

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Postulate Four

In the last postulate Darwin said "Organisms that have the best variations survive and produce (natural selection)." The picture below shows how these birds have changed in some ways because animals change in order to adapt, and live a longer/better life.

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Sources (APA)

O'Brien, Jamie. "Sea•thos Foundation." Sea•thos Foundation. Sea•thos Foundation, 09 Nov. 2011. Web. 04 Apr. 2016. <http://www.seathos.org/tag/endangered-species/>.


Tomkins, Jeffrey P. "Human DNA Variation Linked to Biblical Event Timeline." Institute Creation Research. ICR, n.d. Web. 4 Apr. 2016. <http://www.icr.org/article/human-dna-variation-linked-biblical/>.


Pianka, Eric R. "Convergent Evolution." Convergent Evolution. Zo U Texas, n.d. Web. 04 Apr. 2016. <http://www.zo.utexas.edu/courses/THOC/Convergence.html>.