This updated edition prepares students to succeed on the SAT Subject Test in Biology E/M (Ecology and Molecular). This comprehensive manual presents--<li>A short diagnostic test</li><li>Two full-length Biology E/M practice tests</li><li>All test questions answered and explained</li><li>A test overview and an extensive subject review of all topics covered on the exam</li><li>More than 350 additional practice questions with answers<br>The practice tests reflect the actual test in format and degree of difficulty.</li>