BIOL 1150- Midterm Exam Guide - Comprehensive Notes for the exam ( 21 pages long!)
Document Summary
Describe the earth as a closed system with energy as the only input. Define and demonstrate use of the terms biosphere, ecosystem, community, population, niche and habitat. Describe how energy moves through an ecosystem and construct an original food web. Explain practical concerns that result from decreasing biodiversity. 99. 9% of the species that have ever existed on the planet earth are extinct. Current extinction rate is estimated to be >1000x normal background levels. Mass extinction - a large number of species become extinct over a short period of time. Background extinctions - these extinctions occur at lower rates during times other than due to extraordinary and sudden environmental change. mass extinction. The study of interactions between organisms and between organisms and the environment. From the greek word oikos which means home . Enters the living world as photosynthetic organisms trap the sun"s energy and transform it into glucose during photosynthesis.
