Darwin's Postulates
Fabiana Guajardo
Darwin's FOUR POSTULATES
- Individual organisms have differing traits from other organisms in their species. These include shape and size.
- Some trait differences are heritable from parent through offspring in every generation. For example, blue-eyed parents have offspring with blue eyes.
- In every generation, there are more offspring than the number of those who can actually survive. Therefore, only some individuals get to produce offspring–some more than others.
- There exist organisms that have certain heritable traits that makes them more likely to survive and reproduce. This is called natural selection: when individual organisms with certain characteristics produce more offspring than individuals without those characteristics.
Biston Betularia
Biston betularia is a type of moth found in Europe that carries two different phenotypes, gray and black, that differ by a single gene. The moths in this example have become commonly known as the peppered moths due to their distinguishing colors.
Micro Evolution
Scientists are able to see evidence of Darwin's postulates through examples of microevolution that can be found everywhere.
Arctic Hares
White and brown hares living in the arctic represent natural selection because white hares will most likely survive in that biome.
Theory of Evolution
- The process by which organisms change over time as a result of changes in heritable physical of behavioral traits.
- All life on Earth is connected and related to one another; we have a common ancestor
- Diversity is a product of population modifications by natural selection
Bibliography
Bootle, O. (2011, March 1). Are humans still evolving by Darwin's natural selection? Retrieved April 04, 2016, from http://www.bbc.com/news/science-environment-12535647
Devon Moth Group. (2016). Devon Moth Group. Retrieved April 04, 2016, from http://devonmoths.org.uk/
Steele, L. (n.d.). The Darwinian Concept of Natural Selection as Supported by the Microevolution of Biston betularia. Retrieved April 04, 2016, from http://www.public.coe.edu/wac/darwin.htm
Than, K. (2015, May 13). What is Darwin's Theory of Evolution? Retrieved April 04, 2016, from http://www.livescience.com/474-controversy-evolution-works.html
Zastavki. (2010, May 20). Running White hare. Retrieved April 04, 2016, from http://www.zastavki.com/eng/Animals/Beasts/wallpaper-22714.htm
About me
Email: 16guajardo4285@asfm.mx
Website: http://16guajardo4285.wix.com/bioasfm
Location: Monterrey, Mexico
Twitter: @studentfabiana