The filament of spirogyra were put into equal volumes of sugar solutions X and Y. After 5 minutes, filaments from solution X had their cells contents rounded up while those from Y were unaffected. The experiment shows that

A.

solution X was stronger than Y

B.

solution Y was stronger than X

C.

Spirogyra used up the sugar in solution X

D.

solution X is good for stimulating sexual reproduction in Spirogyra

E.

solution Y was less contaminated than X

Correct answer is B

 - osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane.