Darwin's Four Postulates

Haiku Week 11

The Four Postulates

1. Variation among individuals within species.

2. Some of the variation is heritable.

3. Overproduction of young is the rule.

4.Non-random survival and reproduction: the individuals with the most favorable traits survive and reproduce more than do individuals with less favorable traits. These traits are passed on the next generation, thus resulting in evolutionary change.


Buffalo State University. (n.d.). Ch 3. Darwinian Natural Selection. Retrieved April 04, 2016, from http://faculty.buffalostate.edu/penaloj/bio405/outline3.html

Shomu's Biology. "Evolution Part 2, Darwin's Postulates (theory of Evolution)." YouTube. September 29, 2013. Accessed April 04, 2016. https://www.youtube.com/watch?v=o4HLfcK4lIY.

UC Berkeley. "Introduction to Ecological Genetics." Darwin’s Four Postulates. Accessed April 04, 2016. http://ib.berkeley.edu/courses/ib162/Week1.htm.

University of Evansville. "Natural Selection." Natural Selection. Accessed April 4, 2016. http://faculty.evansville.edu/de3/b32003/lecture summaries/selection.pdf.