The second theme, common descent, discusses on how every organism on earth can are interlinked to one another through common ancestry.
The contents of Darwin's Theory of Evolution can be based upon 5 key themes.
"Evolution of Such" refers to how Darwin believed that animals can evolve over an epoch of time.
Finally, Natural Selection refers to survival of the fittest and how organisms naturally gain beneficial traits. It refers to the ability to change within a species.
Gradualism was a concept that Charles proposed suggesting evolution took place at a slow pace. This lead hem to accurately believe that the Earth's existence was longer than what was estimated at the time.
Population specian refers to Darwin's thoughts on how hereditary traits are affected by the enviroment.
Naturalist Charles Darwin releases "The Origin of Species", politician says it can change the course of zoology, botany and biology forever.
Cells procure some small proteins that appear to be the instructions for the characteristics of a body. They also are in every cell. Wait! Darwin stated how traits are passed on from parent to offspring, and Gregor Windel proposed the existence of such proteins.