The burning of fossil fuels has greatly increased the level of CO2 in the atmosphere. If the level of CO2 continues to rise, which will most likely occur in an ecosystem?
O A. The number of producers and consumers will increase.
O B. Acid rain will have a much higher pH.
O C. The levels of groundwater will increase significantly.
O D. The atmospheric temperature will increase.

D

Explanation:

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.