Explain that variation among offspring is a potential evolutionary advantage resulting from sexual reproduction.

The offspring of sexually reproducing organisms are all genetically unique. Because of this, sexually reproducing organisms may have more successful survival of offspring in environments that change than asexually reproducing organisms, whose offspring are all genetically identical.

Gated potassium channels open and allow potassium ions to flow out. This is what restores the resting potential after the action potential passes through an axon.