BIOL 105 Lecture Notes - Eukaryote, Archaea, Homeostasis

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Life"s levels of organization define the scope of biology. A structural hierarchy of life, from molecules to ecosystems, defines the scopes of biology. At the top of life"s hierarchy is the ecosystem. All the organisms in an area which make up a community. Interbreeding organisms of the same species, a population. Cells are the structural and functional units of life. A cell- is the basic unit of life. 1) eukaryotic cells- contain membrane-enclosed organelles, including a dna-containing nucleus. The diversity of life can be arranged into 3 domains. Organisms are grouped (classified) into the prokaryotic domains bacteria and archaea, and the eukaryotic domain. Protists (protozoans, and algae, falling into multiple kingdoms) the. All organisms share a set of common features, signs of unity in life"s vast diversity. Hierarchy: living things are dependent on one another, metabolic processes. Energy flows in and out constantly: homeostatic control processes. You exercise and your body temp. rises to 38 c.

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