Does photosynthesis have fermentation

Yes photosynthesis has fermentation and this usually happens when there i  is insufficient oxygen that cannot support the cellular respiration reaction. In the absence of enough oxygen, our cells are become unable to carryout the respiration.

Thus, these cells start respiring through the mechanism of fermentation, which is an alternative method of producing energy. In the process of this alternative pathway of energy production, these cells disintegrate the sugar molecule to release energy. Also products like CO2 and lactic acid/ethanol are produced along with energy. Fermentation gets enable only in the absence of oxygen and these situations usually arises when the body is extremely tired due to heavy exercise or work.

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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