4.2.7 What is Darwin’s Theory of Evolution?

Charles Darwin, ca. 1868.


The theory of evolution by natural selection, first formulated in Darwin’s book “On the Origin of Species” in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits. Changes that allow an organism to better adapt to its environment will help it survive and have more offspring (Livescience, 2018).

Read: What is Darwin’s Theory of Evolution? // LIVESCIENCE

Guiding Questions:

  1. What is the theory of evolution?
  2. How does this article define “fitness”?
  3. What evidence supports this theory?

Thumbnail: Charles Darwin. Photo Credit: Julia Margaret Cameron, 1868.