Final answer:
The plasma membrane in Whitefish Blastula is located on the outer surface of the cells and plays a role in regulating substance movement and cell signaling.
Step-by-step explanation:
The plasma membrane in Whitefish Blastula is located on the outer surface of the cells. It is a thin, flexible barrier that surrounds the cytoplasm and separates the internal contents of the cell from the external environment. The plasma membrane is responsible for regulating the movement of substances into and out of the cell.
For example, nutrients and oxygen can enter the cell through the plasma membrane, while waste products and other substances can exit the cell. The plasma membrane also plays a role in cell signaling and communication with other cells.