BBC. (2012a). Life processes activity. Retrieved from: http://www.bbc.co.uk/schools/ks3bitesize/science/organisms_behaviour_health/life_processes/activity.shtml

BBC. (2012b). Life processes-movement. Retrieved from: http://www.bbc.co.uk/schools/ks3bitesize/science/organisms_behaviour_health/life_processes/revise6.shtml

BBC. (2008c). The wonderful world of sea sponges. Retrieved from:

            http://www.youtube.com/watch?v=BW05vMziy2o

Harder, B. (2002). Was the humble sponge Earth’s first animal? Retrieved from:

            http://news.nationalgeographic.com/news/2002/04/0401_0401_shapeoflife1.html

Oxford University Museum of Natural History. (2006). The living animal, Mrs. Nerg,

and the seven life processes. Retrieved from: http://www.oum.ox.ac.uk/thezone/animals/life/index.htm

Tree of Life (2004).  All about sponges. Retrieved from:

http://tolweb.org/treehouses/?treehouse_id=3431

 W.W. Norton and Company, Inc. (2012) Photosynthesis and cellular respiration.

Retrieved from: http://www.wwnorton.com/college/biology/discoverbio4/_core/ch/08/animations.aspx