This high school classroom supplement to the main biology text prepares students in New York State to succeed on the Regents Exam. It presents a subject review, practice ques-tions with answers, and two complete Regents Biology Exam with answer keys. When combined with Barron's Regents Exams and Answers, Biology, it provides students with the most comprehensive test preparation available anywhere. Topics reviewed include ecology, biological organization, formation and structure of the ecosystem, and the interaction between human beings and the biosphere.