In which situation would water enter a cell through osmosis? A. The cell is 20% water, and the cell's environment is 80% water,
B. The cell is 50% water, and the cell's environment is 50% water,
C. The cell is 60% water, and the cell's environment is 40% water.
D. The cell is 80% water, and the cell's environment is 20% water.

A

Explanation:

Water enters osmosis when the cell's water is lower than its environment's water. This is known as Hypertonic. B is an equalibrium so nothing special happens there, and C and D are examples of potential bursting of the cell from too much water, known as Hypotonic, so in process of elemination, A would be the answer. Another way of telling that C and D aren't the answer is that if they were really true, both of them would be correct, and there can't be two correct answers.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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