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Chapter 3 APES notes

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Subject: 
Environmental Science
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Tags: 
Biology
Ecology
Chemistry
Geochemistry
Systems ecology
Biogeochemical cycle
Biogeography
Food web
Natural environment
Carbon Cycle
ecosystem
Primary production
Environment

Ecology -The study of how organisms interact with one another and their physical environment of matter and energy. All living organisms are composed of cells. Cell-the smallest and most fundamental structural and functional units of life. The idea that all living things are composed of cells is called cell theory. Organisms can be classified as either eukaryotes or prokaryotes A eukaryote is a cell surrounded by a membrane that has a distinct nucleus and other internal parts called organelles. A prokaryote is a cell surrounded by a membrane but has no distinct nucleus or organelles surrounded by membranes. For a group of sexually reproducing organisms a species is a set of individuals that can mate and produce fertile offspring.

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