Concepts in Biology Credit Hours: 3 hours. Level: Undergraduate Course topics explore chemistry of life, environmental endocrine disruptors' effects on gene expression, genetic testing, immunity, and effects of global nutrient cycling on climate change and eutrophication. Students apply principles to real-world situations, identify, interpret, and evaluate valid sources of scientific information, and apply that information to everyday decision-making. Duplicate Credit: Not open to students with credit in PBIO 1210, BIOL 1103E, BIOL 2103H Semester Offered: Fall Spring