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 testTwo full-length Biology E/M practice testsAll test questions answered and explainedA test overview and an extensive subject review of all topics covered on the examMore than 350 additional practice questions with answers The practice tests reflect the actual test in format and degree of difficulty. The included CD-ROM presents two additional full-length practice tests with all questions answered and explained, and automatic scoring. System Requirements: Windows: Intel Pentium II 450 MHz or faster 128 MB RAM Windows 2000, XP, Vista 1024 X 768 display resolution CD-ROM Player Macintosh: PowerPC G3 500 MHz or faster Mac OS X v.10.1 through 10.4 128 MB RAM 1024 X 768 display resolution CD-ROM Player