<span>The steps of speciation are identified as reproductive isolation and
genetic change. These can happen simultaneously or one after the other. This means
that the main aim is to have new species through evolutionary changes brought
by geographic barriers separating a population or due to behavioral change in a
sub-population and even being reproductively isolated. </span>
Answer:
Repolarization
Explanation:
Complete repolarization is achieved by the sodium pump. This actively pumps all the Na+ ti the outside and all the K+ to the inside. The pump requires energy in the form of ATP and is inhibited by metabolic poisons. Entry of Na+ is immediately followed by an increase in the permeability of the membrane to K+. These diffuse rapidly to the outside due to the concentration gradient. Being positively charged, the K+ reverses the polarity of the membrane making the outside positive.
