Algae are a non-monophyletic group of organisms that play critical roles in ecosystem structure and function. They have a long history of being used in a variety of ways by the human species, but are increasingly being applied to modern issues of understanding water quality and climate change, engineering at the nano scale and in the production of renewable biofuels. Recommended prerequisites: EBIO 1210 and EBIO 1220 and EBIO 1230 and EBIO 1240 (minimum grade C-). Same as EBIO 5080.