This is a lecture presentation for my BIOL 201 Invertebrate Zoology students on Chapter 5: Porifera and Placozoa (Invertebrate Zoology, 7th Ed. by Ruppert, Fox, & Barnes, 2004).
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
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Thanks for looking!
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