Reference

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Dolphin, W.D. “Phylum Porifera”. Animal Phylogeny: Investing the Evolution of Body Plan. <http://www.biology.iastate.edu/Courses/201L/Porif/%20Porifindx.htm>.

Fenner, Robert. “Sponges, Phylum Porifera, Part 1”. Wet Web Media. <http://www.wetwebmedia.com/sponges.htm>.

Miller, Kenneth R. and Joseph Levine. Biology. 4th ed. Upper Sadle River, NJ: Prentice Hall, 1998.

“Reproduction”. Phylum Porifera. <http://www.daniel-wright.district103.k12.il.us/lbest/Porifera/reproduction.html>.

Rollins, Debra. “Fun Facts”. Kid’s World. <http://library.thinkquest.org/26502/level1/studies.htm>.

“Sponge”. HighBeam Encyclopedia. 2007. <http://www.encyclopedia.com/doc/1E1-sponge.html>.

"Sponges Quiz". Sponges. 2007. <http://www.mcwdn.org/Animals/SpongesQuiz.html>.