http://www.amazon.com/CliffsAP-Biology-Practice-Exams-Cliffs/dp/0471770272/ref=sr_1_1?ie=UTF8&s=books&qid=1230161300&sr=8-1 http://www.amazon.com/Introduction-Biology-Test-Yourself-Learningworks/dp/0844223646/ref=sr_1_1?ie=UTF8&s=books&qid=1230161395&sr=1-1 i got these at a local library and the questions are fairly difficult. do u know what a mycorrhizae is in respect to ecological interaction? apparently the ap bio exam book expects u to know.

2 Great Bio Books to test with

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http://www.amazon.com/CliffsAP-Biol...=sr_1_1?ie=UTF8&s=books&qid=1230161300&sr=8-1

http://www.amazon.com/Introduction-...=sr_1_1?ie=UTF8&s=books&qid=1230161395&sr=1-1

i got these at a local library and the questions are fairly difficult. do u know what a mycorrhizae is in respect to ecological interaction? apparently the ap bio exam book expects u to know.

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