What evolutionary advantage might on/off signaling have over this continuously variable kind of signaling?

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A threshold to cause a signal is lower than in graded potentials. Graded potentials can cause a strong but single depolarization signal.

The speed of propagation is much faster as depolarization in one location causes depolarization in the neighboring ones.

Propagation of the on/off signals requires less ATPATP because the neighboring locations can depolarize each other.

The on/off signal may be propagated over long distances without any decay. Therefore, the signal is reliable.

The power of the stimulus does not matter once it triggers the signal. Therefore, different stimuli may cause the desired response.

Answer :The speed of propagation is much faster as depolarization in one location causes depolarization in the neighboring ones.

Propagation of the on/off signals requires less ATPATP because the neighboring locations can depolarize each other.

Explanation:

Some of the evolutionary advantage that on/off signaling have over this continuously variable kind of signaling are :

the answer is "a.) well–developed vascular system."

explanation: