BIOZONE's NCEA Level 3 Biology (Externals) has been developed as a versatile resource for use in the classroom, homework, revision, and exam preparation. It covers all external Achievement Standards for Level 3 Biology and has been substantially revised, including the addition of a special scholarship section for more able students. Careful scaffolding and an emphasis on critical content and NCEA exam practice promote deeper understanding and develop the skills and knowledge required to achieve at this level. Achievement Standards: AS 3.3: Responses of plants and animals to their environment. AS 3.5: Evolution and speciation. AS 3.6: Human evolution.