Darwin's Four Postulates
Charles Darwin dedicated his adult life to observe nature and eventually discover Natural Selection (“The Origin of Species” his most famous book).
1) Variations of Phenotypes
Populations can have more offspring than resources (food & water) can support.
Survival and Reproduction Rates
Amherst. (n.d). Natural selection. Amherst College. Retrieved April 4, 2016.
Evansville. (n.d.). Natural Selection. Evensville Education. Retrieved April 5, 2016.
Khan Academy. (2016). Crash Course Biology and ecology: Natural Selection. Khan Academy. Retrieved April 4, 2016.
Understanding evolution. (2016). Natural Selection. University of California Museum of Paleontology. Retrieved April 6, 2016