All living things contain carbon. which of the following statements are true about carbon atoms? i. each carbon atom can form single bonds with up to four other carbon atoms. ii. each carbon atom can form double bonds with up to two other carbon atoms. iii. carbon atoms can join together to form chains or rings. iv. a single molecule of some compounds can contain thousands of carbon atoms.

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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identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.v