This updated edition prepares students to succeed on the SAT Subject Test in Biology E/M (Ecology and Molecular). This comprehensive manual presents:

• A short diagnostic test
• Two full-length Biology E/M practice tests
• All test questions answered and explained
• A test overview and an extensive subject review of all topics covered on the exam
• More than 350 additional practice questions with answers

The practice tests reflect the actual test in format and degree of difficulty. An accompanying CD-ROM presents two additional full-length practice tests with all questions answered and explained, and automatic scoring.