生物科学学士学位课程至少需要120个学分，包括所有专业的必修课（请参见下面的专业准备）和四个特定领域（普通，生态学，分子和细胞生物学及生理学）之一的课程）。生物科学系的使命是为学生提供生物科学方面的一流教育。我们目标的核心是将丰富的实验室经验与传统和创新的课堂教学法和技术相结合。实验室和课堂活动的结合使学生参与了生物学探究和批判性思维的过程，为学生提供了有关生物学原理的动手经验，并对学生进行了现代技术方法的培训。完成我们课程的学生在科学的实践和知识方面受过良好的教育，并做好成为社会上富有成效的成员的充分准
Biology is the study of living processes from the interaction of species with each other and their environment to the operant molecular mechanisms. The California State University San Marcos Biological Sciences Department presents a broad program of courses that deal with life on the ecosystem, population, organismal, and molecular levels. Life is a complicated series of chemical reactions and interactions, and we seek to understand the relationship of organisms to each other, to their environment, and within themselves in biochemical terms. Biological Sciences majors may choose between: 1) A General Concentration, 2) A Molecular and Cellular Biology Concentration 3) An Ecology Concentration and 4) A Physiology Concentration. The general concentration provides wide exposure to the range of Biological Sciences while the cell/molecular, ecology, and physiology concentrations offer majors the opportunity to focus their studies. With an appropriate choice of Biological Sciences electives and General Education electives, graduates can meet the requirements of admission to graduate, medical, dental, optometry, veterinary, and other professional schools.