What is the most likely effect a decrease of plant life in the biosphere would have on the atmosphere?
a.
a decrease in plant life would have no effect on the atmosphere.
b.
a decrease in plant life would cause carbon dioxide levels to increase and oxygen levels to decrease.
c.
a decrease in plant life would cause carbon dioxide levels to decrease and oxygen levels to increase.
d.
a decrease in plant life would cause an increase in all gases in the atmosphere.

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.