This is a lecture presentation for my BIOL 102 General Biology II students on Chapter 25: History of Life (Biology 9E by Campbell et al, 2011).
Rob Swatski, Assistant Professor of Biology, Harrisburg Area Community College - York Campus, York, PA.
Please visit my website, BioGeekiWiki, for more biology learning resources: http://robswatskibiology.wetpaint.com
Visit my Flickr photostream for anatomy model photographs!
Thanks for looking!