Y12 Cell structure and division

Prokaryotic and eukaryotic cells - some sites to help with this.

http://www.s-cool.co.uk/a-level/biology/cells-and-organelles/revise-it/introduction-to-cells

http://www.cod.edu/people/faculty/fancher/prokeuk.htm

Another vid of fertilisation in a marine worm

http://www.youtube.com/watch?v=LLau8SNSVf0

http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__mitosis_and_cytokinesis.html

http://www.sumanasinc.com/webcontent/animations/content/independentassortment.html