Wegener believed continents moved, but he did not know how. Identify what needed to happen before Wegener's idea about moving continents could be proven.(1 point) Advances in technology were needed to gather more evidence.

Wegener had to recheck his data and change his conclusions.

Scientists had to directly observe tectonic plate movement.

New information was needed on the composition of Earth's crust.

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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the growth of the plants is affected by the heat of the light. what is the student doing?