This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Chapter 22 Principles of Evolution Goals for Lecture 1 Learn historical context for theory of natural selection Understand how Darwin developed the theory, and his observations and predictions Understand how artificial selection, biogeography, homologies and fossil record all support the theory Theory is a general explanation of important natural phenomena, developed through extensive and reproducible observations Hypothesis is a tentative explanation of observations Evolution-- Changes through time in populations Darwins contributed the mechanism, natural selection Putting the theory in historical context Plato and Aristotle believed that species were immutable. Cuvier recognized fossils and that they were extinct, and older fossils were in deeper rocks, but still thought species immutable.. In the early 1800s, Lyell realized geological formations were due to long term deposition Lamarck developed the first theory for evolution, that structures evolved as they were used more. Giraffes neck is the classic example Fig. 22.2 Fig. 22.3 Darwins contributions Darwin noticed different geographic faunae during his voyage on the Beagle Darwins...
View Full Document
- Spring '08