Amarine biologist is studying dolphin calls and notices that sometimes the calls sound louder based on the background noise in the water. she concludes that the sound waves are adding together. what type of wave interference does this describe?
a. constructive
b. dismissive
c. destructive
d. refractive

The correct answer is A.

Explanation:

In the given example, the observation is that sometimes the sound becomes louder, which means that the amplitude of the sound waves are increasing. In that case the correct answer is "Constructive Interference" which is observed when two sound waves with the same phase collide and amplify each other because their oscillations are synchronized. I hope this answer helps.

i do not know and i have a 100 in this class

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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