Ocean ecosystems act as a carbon sink removing atmospheric carbon dioxide, which is
dissolved in the seawater. Which biological
process would then utilize this dissolved
carbon dioxide?
A. photosynthesis by oceanic fish.

B. photosynthesis by phytoplankton

C. aerobic respiration by marine mammals

D. anaerobic respiration by marine protozoa

answer; ////increased water pollution; ///////////////////////

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

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