An introduction to how the diverse organisms on this planet have been affected by their ennvironment and how the current environment is the product of the activities or organisms. The course also examines how evolution has operated over long time periods to produce major groups of organisms and how evolutionary origins are reflected in their classsification. The principles that underlie our understanding of the major lineages will be discussed using examples from bacteria; fungi; protists; animals; and plants. A description of the involvement of organisms in major ecosystem processes leads to an evaluation of the stability of those systems and of human impact on the processes. Prerequisite: Biology 30 Note: BIOL 217 and 218 can be taken in either order