“Biology 12” Units 3 and 4 of the VCE Biology course accredited for the period 2006-2009. It has been written specifically to enable students to attain high grades in their VCE examinations. Non-essential material has been edited out of the text leaving the student with a clear guide to the key content areas that will be assessed in each unit. There are numerous well-researched illustrations contained in the book, which enhance comprehension of the written text.