Answer:
A. The blood goes back to the heart to get oxygen.
Cell differentiation is mostly directly regulated by THE DNA.
The DNA is a component of a living cell and is the one that is majorly responsible for directing cell differentiation. DNA molecules carries the genetic information and this information are incorporated into new cells during the process of cell differentiation. Cell differentiation process produced specialized cells.
Zambia
The other three are already well established.
The answer is C
The reason why is because an Earthquake is the shaking that radiates out from the breaking of a rock
