4 Dry conditions caused the water level in a lake to lower over time, and eventually the one large lake became
two smaller lakes. As a result, a fish species that lived in this lake was also separated into two groups. The
food sources and predators differed between the two lakes. After thousands of years, water levels increased
and the separate lakes became one large lake again. Which of the following is most likely to occur?

the correct answer is - ability to find a mate

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.

the scientific method.