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This book reviews the more challenging material in a college-level, introductory course in biology. It is intended to supplement standard textbooks in biology, or for students who wish to review such material. 11th Hour: Introduction to Biology is of particular use to students enrolled in a majors or non-majors introductory biology course, or students taking AP biology. It concentrates on those topics that usually give students the most difficulty, and problems/questions are rated throughout in terms of their level of difficulty.

• Concentrates on those concepts that usually give students the most difficulty.
• Provides ample opportunity to test the mastery of this material.
• Rates questions/problems according to their level of difficulty.
• Additional information provided on the internet site related to this topic - www.blackwellpublishing.com/11thhour.