Consider the two male oryx that are shown below.

which of charles darwin’s main points is depicted in the image?
organisms within a population compete with each other to survive.
over time, beneficial variations will be passed on to future generations.
more offspring are produced than can be supported by an environment.
all organisms within a population have an equal chance for survival.

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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many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: