In many places, large areas of land have been converted into heavily populated cities full of buildings and concrete. This proce
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They are further classified into: fish, amphibians, birds, reptiles and mammals.
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The answer is graded potential<span>. Its made of various action potentials that depolarise the neuron incrementaly, in short interspersed intervals that do not give time for the neurons to return to resting potential. Therefore, the actions potentials, of varying sizes, grade up in sum and when they cumulatively reach the threshold level, they invoke an impulse in the nerve</span>
