Biology II Chapter 15: The Theory of

Evolution

Mr. Crowder

09-10

Chapter 15: Types of Fossil Evidence

Explaining the History of Life

• Most of the evidence for evolution is indirect evidence—meaning that we cannot see it evolving right here, right now.

• Fossils are a major source of indirect evidence

Chapter 15: Types of Fossil Evidence

Explaining the History of Life

Evidence found in the fossil record:

1. Homologous structures:

Pg. 401

: features with a common evolutionary structure and/or function

Chapter 15: Types of Fossil Evidence

Explaining the History of Life

Evidence found in the fossil record:

2. Analogous structures:

http://www.peabody.yale.edu/exhibits/treeoflife/images/convergence4.jpg

: features that perform similar functions but evolved differently

Chapter 15: Types of Fossil Evidence

Explaining the History of Life

Evidence found in the fossil record:

3. Vestigial structures:

http://www.iss.k12.nc.us/schools/shs/jmccartney/natsel.html

: a present-day body structure that no longer serves a purpose.

Chapter 15: Types of Fossil Evidence

Explaining the History of Life

http://studentreader.com/category/ecology-biodiversity/

Any Questions?