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Unformatted text preview: between the body and the environment. Some obvious examples: Lungs or gills - O 2 and CO 2 Small intestine (digestive system) - glucose, amino acids, nucleic acids, fatty acids Kidneys (excretory system) - urea, creatinine, H 2 O and salts 3. [1 pt] Oxidative metabolism can generate 18X as much ATP as non-oxidative metabolism starting from the same amount of glucose. Given the poor efficiency of non-oxidative metabolism, why haven't all of the anaerobic bacteria gone extinct? Name_____________________________ The Earth offers a vast array of differing habitats, and some of those habitats have very low O 2 partial pressure. Anaerobic bacteria are better adapted to live in those places than aerobic organisms, and hence out compete them....
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