Why does anaerobic respiration produce less energy than aerobic respiration?

ANSWER:

Aerobic respiration will occur when there is presence of oxygen. This oxygen breaks down the glucose down all the way to carbon dioxide which can produce almost 38 molecules of ATP and so aerobic respiration releases more energy.

EXPLANATION:

Anaerobic respiration will occur when there is absence of oxygen. This respiration can break glucose into only two molecules of pyruvate. This is sufficient to produce only "two molecules of ATP". This amount of energy released is much less as compared to aerobic respiration.  

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.