How does the cell membrane of a tube worm maintains a stable environment

The cell membrane of a tubeworm is selectively permeable and they prevent minerals in the water from flowing it in the cell of tube worms. By doing this the cell membrane protects the cell from any osmotic damage. By selectively preventing these minerals it maintains the stable environment in the cell

i am positive it is c. condensing but i may be wrong

it takes hundreds of years to become stable.

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