This updated edition prepares students to succeed on the SAT Subject Test in Biology E/M (Ecology and Molecular). The manual presents a short diagnostic test and two full-length Biology E/M practice tests that reflect the actual test in format and degree of difficulty. Practice tests come with all questions answered and explained. The book also includes a test overview and an extensive subject review of all topics covered on the exam. The CD-ROM enclosed with the book presents two additional full-length practice tests, all questions answered and explained, and automatic scoring.