You may have heard the "fact" that snails and slugs "melt" when exposed to salt.   A snail's mantle (its outer covering) is a selectively permeable membrane (though not as permeable as a cell membrane). Water can freely pass through the snail's mantle but solutes like salt cannot.   The snail's body contains roughly 30% solute and 70% solvent (water). The salt on the surface of the snail's body creates an environment that is 100% salt.   i

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A:

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