This introductory course covers the biology of the major groups of animals, both vertebrate and invertebrate. Various systems will be discussed (e.g., respiration, nutrition) with emphasis on both the regulatory principle of homeostasis and on the cellular basis of system function. Course designed for biology majors. Also recommended for majors in other sciences, prehealth professional, pre-veterinary students and undeclared students considering science as a major. Majors in other disciplines are strongly advised to take BIO 3 or 4 to fulfill a laboratory science requirement. (3 hours lecture, 3 hours laboratory, one hour workshop/recitation.)