An introductory laboratory designed for students with interest in pursuing a major in science. Laboratory exercises designed to illustrate the principles considered in BIO-110. Topics include cellular structure, respiration, photosynthesis, DNA structure and function, cellular and organismal reproduction, and genetics. Meets two hours per week. Corequisite: BIO-110. Students may only receive credit for one of the following: BIO-105/145 or BIO 110/151.