Darwin's Postulates
By: Paola Rhon
4 Postulates
1. There is a lot of variety within species
2. Offspring looks like their parents, gets traits from them
3. External conditions can affect survival
4. Some traits are not suited for survival and will lead species to die out
Variation
Ex. The rock in the image to the right show variation since they have evolved to having different colors.
Another example of variation is the different breeds of dogs since they are all the same species but throughout time different breeds have been created.
Inheritance
Ex. The picture to the right shows an example of inheritance. The offspring inherited both the brown pigment and the white pigment which made her a color in between.
Differential Survival
Extinction
Sources
BBC. (n.d.). What is Inheritance?. BBC London. http://www.bbc.co.uk/bitesize/standard/biology/inheritance/what_is_inheritance/revision/1/
Britanica. (n.d.). Variation. Encyclopedia Britanica. http://global.britannica.com/science/variation-biology
Martin, S. (Apr 2016). Apocalypse Now?. Express News. https://www.express.co.uk/news/science/658686/Apocalypse-now-Experts-say-Earth-in-middle-of-MASS-EXTINCTION-and-here-s-how-to-survive
Meta, R. (n.d.). Differential Survival. Everything 2. http://everything2.com/title/differential+survival