Why is the cell membrane described as being selectively permeable?
a. it allows anything to enter and exit the cell.
b. it allows nothing to enter or exit the cell.
c. it allows only water to enter the cell.
d. it allows needed materials to enter the cell and wastes to leave the cell.
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Ответ:
It allows needed materials to enter the cell and wastes to leave the cell.
Ответ:
A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. Animal cells simply have a cell membrane, but no cell wall.
Explanation: