The best answer would be "research reasons why species change over long periods of time"
if not i apologize but this is my best guess<span />
What he did was say that evolution happened that over time the birds seemed to be changing
Answer is A
Firstly axon must reach the threshold level and then depolarisation occurs. Depolarisation phrase means sodium enters and potassium leaves the axon . Choice C can't be because main idea is the entering of sodium ions.
Answer:
Recombinant DNA
Explanation:
Recombinant DNA can be used to change the genetic makeup of a cell, as in adding a gene to make a bacterial cell produce insulin.
