Atoms,
Molecules, &
Polymers
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Life is made up almost entirely of six light elements (in order of importance):C, H, O, N, P, S = 99%trace elements: Fe, Mg, Ca, Naelements apparently necessary for life but not understood: Se |
inorganic compounds |
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Organisms make up EcosystemsEcosystems have structure (trophic levels)cycle nutrients, transfer energy LINK: Understanding Lake Ecology LINK: Ecosystem Description (NOAA)
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What is life? (6-7 Characteristics) |