During the rainy months in africa, temporary pools of water form. one fish species, the snakehead fish, is able to walk, using pectoral fins, from pool to pool. other fish in the same area cannot travel from pool to pool. during the dry season, the pools gradually disappear. if the climate in africa remains the same as described, what would you most likely expect to see after many years? a) the snakehead fish will develop legs and feet. b) the snakehead fish will replace the other fish species. c) the snakehead fish will walk to another part of africa. d) the non-walking fish will learn to use their fins to walk.

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.