What was significant to darwin about the fauna and flora of the galapagos islands?

There are more than 500 plant species found on the Galapagos, about one-third of which are endemic.

Explanation:

Endemic meaning that these plant species are native to the islands and found nowhere else in the world. There are also exclusive species of cotton, guava, passion flower, pepper and tomatoes that all grow there.

it would be c. xylem.

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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