Answer:
It is the biological concept of species
Explanation:
In 1970 Mayr stated that "species are formed by groups of potentially intercrossing populations that are reproductively isolated from others". The biological concept of species puts emphasis on existence of barriers that limit the gene flow among groups within the same species
Answer:
B.The water is drawn into the ground by the force of gravity.
... a Y chromosome from the father.
Zero; myocardial infarction. The posterior interventricular artery supplies much of the left ventricle, the systemic pump .