It takes 1000 years for deep waters that sink in the North Atlantic to emerge in the North Pacific. Why do waters sink in the North Atlantic? How do we know it takes 1000 years for this loop to be completed?

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material