How does the hypothesis of microspheres and the rna world hypothesis build off of each other?
a. microspheres were important for storing and releasing energy for surrounding organisms that contained rna.
b. nonorganic molecules self-replicate within the early microspheres, similar to the way cells divide.
c. replicating rna molecules transformed into dna within the microspheres.
d. when microspheres split, the genetic coding in self-replicating rna would pass to the newly formed microspheres.

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explanation:

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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glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.