Lower-Division

A non-survey course suitable for people who have not had biology. A historical and experimental approach covers five key biological concepts: homeostasis, the integration of structure and function, cell theory, the mechanism of heredity, and evolution. Students cannot receive credit for this course after receiving prior credit for BIOL 20A, BIOE 20B, or BIOE 20C. (Formerly Biology 3.) Prerequisite(s): completion of biology placement exam recommended, http://biosci.ucsc.edu/bioplacex.html.

An accelerated introduction to topics in the organismal biology of plants and animals, covering morphology, anatomy, physiology, and development. Biology 21B counts as the equivalent of Biology 20B for prerequisites and major requirements. Prerequisite(s): grade (or equivalent performance level) of A in course 20A, or grade (or equivalent performance level) of A or B in course 21A.

Accelerated introduction to ecology and evolution, emphasizing principles and processes spanning molecular, organismal, population, community, and ecosystem levels. Topics include history of Earth and life, physical and chemical environments, biogeochemical cycling, genetic and phenotypic variation, natural selection, adaptation, demography, species interactions, speciation, macroevolution, and biogeography. Biology 21C counts as the equivalent of Biology 20C for prerequisites and major requirements. Prerequisite(s): by application; passing score on biology placement examination.

An introduction to the biology of human nutrition and its effects on human health. The course explores how nutrient balance, exercise, and age interact in their effects on human health, fitness, and disease.

An overview of the biology of infectious diseases in human societies including why diseases vary in severity, how human bodies defend themselves, and how public health efforts cope with the problem of rapidly evolving pathogens.