cliff's AP biology

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annak88

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Do i need to get the 4th edition cliff's AP biology or the 3rd edition is just fine. is there a lot of different between these two editions?
 
Do i need to get the 4th edition cliff's AP biology or the 3rd edition is just fine. is there a lot of different between these two editions?

Use the 3rd, the 4th edition is only being released this year because of changes being made to the AP Biology curriculum.