The purpose of this course is to provide an overall survey of living organisms from both an evolutionary and an ecological perspective. We begin by addressing the genetic code, cell reproduction, and the mechanisms governing heredity. From here, we examine the evolutionary processes by which today's life forms have originated through the descent and modification of more ancient forms of life, as well as the underlying genetic mechanisms responsible for this change. We then look at the possible origins of life on earth, and the evolutionary processes that could have led from the first unicellular organisms to the multicellular complexity of our current ecosystems. Finally, we examine some of the ecological principles governing the relationships between organisms and their environments, and address some of the Earth's major environmental problems.