The answer is A- mesophyll
The correct answer is eukaryotic cells.
Microscopic subunits within the cell represent the organelles found only in complex eukaryotic cell. The communication between those organelles via signal molecules are also a good example of the functioning of eukaryotic cell.
Eukaryotic cell is a cell that contains a nucleus and organelles, and is enclosed by a plasma membrane.
The answer you are looking for is Natural Selection.
Stem cells grown on a hard, rigid surface are biased into differentiating into a bone cell lineage. <span />
