BIOL 1F25 Study Guide - Comprehensive Midterm Guide: Measles Vaccine, Monera, Blood Pressure
5 Oct 2016
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Living things have a different molecular composition than nonliving things. Metabolism: physical & chemical processes that transform energy and molecules from one form to another in order to sustain life. Composed of cells cells: smallest unit that shows all characteristics of life unicellular organisms: composed of only one cell. Maintain a relatively constant internal environment o homeostasis: keeping internal conditions near optimal levels. E. g. temperature, ion concentration, and acidity cell membrane: barrier for substances to enter cell"s internal space. Respond to the external environment plants turn towards sunlight bacteria move toward nutrients animals seek optimal temperature: ion = molecule with electric charge (+/-) Multicellular organisms start from a single cell that divides living organisms produce new organisms genetic material encoded in deoxyribonucleic acid (dna) is passed to children. Populations of living things evolve change from one generation to the next. Individual organisms don"t evolve & don"t reproduce. Populations of individual organisms have the capacity to reproduce & evolve.
