Darwin's Postulates

Gabriela Rivero F

Who is Charles Darwin?

  • February 12, 1809 - April 19, 1882
  • Occupation: Biologist, Scientist
  • Developed the theory of evolution
  • Explains the biological change in four postulates
  • Best Work: On the Origin of Species by Means of Natural Selection.
  • After 200 years, his work is still true and intact.
  • He knew that his theory still had holes to fill, but his theory was still correct.
  • Darwin didn't understand how evolution happened.
  • Realized that species change.
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Postulate 1

According to Darwin's line of evidence, postulate number one says that ''individual organisms can vary in the traits they possess, such as their size and shape''. In other words, this means that individuals within species may vary. I choose the picture above because it shows a species: human and it shows the different variations: height, color, race, sex.
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Postulate 2

According to Darwin's line of evidence, postulate number two says that ''Some of the trait differences are heritable, meaning that they are passed on to an offspring.'' In other words, the offsprings resemble their parents since some traits are passed on to the next generation. (see picture above)
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Postulate 3

According to Darwin's line of evidence, postulate number three says that ''In each generation, more offsprings are being produced than can possibly 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.'' In other words, more offsprings are produced than can survive, meaning that the individuals that survive & reproduce are those that are best suited for their environment. The picture above shows many baby turtles, this animal is a perfect example of the definition of postulate 3.
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Postulate 4

According to Darwin's line of evidence, postulate number four says that ''Organisms that have the best variations survive and produce (natural selection).'' The picture above, shows how the two butterfly's have adapted to their environment. In this example, they have changed their color for their camouflage.


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