What is seen near the end of january and february that can't be seen at the beginning either month?

-uary

Explanation:

The question you were given isn't related to these months in terms of weather or something similar. You were actually given a riddle - a question with a double meaning presented as a puzzle that needs to be solved.

The names January and February have a common ending. Both of them end in -uary - the combination of letters that can't be seen at the beginning of the name of either month.

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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ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg