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. BONUS ONLINE PRACTICE TESTS: Students who purchase this book will also get FREE access to two additional full-length online SAT Biology Subject Tests with all questions answered and explained. The online exams can now be easily accessed by computer, tablet, and smartphone.