The below links will take you directly to the specification as GryphonScience are far too old to keep printing stuff.
The following link: 2015 AS Specification
The following documents outline the specification on a chapter by chapter basis. You are expected to print them as you are taught each chapter and stick/staple them in your textbooks on the first page of each chapter.
Module 1: Development of practical skills in biology
Module 2: Foundations in biology
Module 3: Exchange and transport
Module 4: Biodiversity, evolution and disease