Answer:
sea water contains a salt
Explanation:While a constant supply of freshwater happens by itself in natural streams, an aquarium is by definition, a closed system. So here, man has to help out in order to provide new..
Symbiotic Relationship.
Hope this helps.
Yes,
The cell, or plasma membrane, serves as a selectively permeable boundary between the internal cytoplasm and the external environment. All cells are composed of a plasma membrane.
The cell wall is situated to the outside of the cell membrane, and mainly functions to prevent osmotic rupture. Many taxa employ a cell wall, although some function without one
<span>All multicellular organisms have specialized cells.</span>