What are the introductory courses in the life sciences?

Life Sciences 1a (LS 1a) and Life Sciences 1b (LS 1b) were designed as the foundation for the life sciences concentrations.  Based on your background preparation, Life and Physical Sciences A (LPS A) may serve as an alternative to LS 1a. The fall semester courses, LS 1a and LPS A, introduce chemistry, molecular biology, and cell biology.  LS 1b, which is offered in the spring, covers topics in genetics, genomics, and evolution.