U.C.E BIOLOGY 2009 PAPER 1 QN 23

Strips W, X, Y and Z of same size and shape were cut from a raw pawpaw, whose sap had a sugar concentration of 28%. The strips were then placed in sugar solution of different concentrations as shown in table 1.

Strip       Sugar concentration of solution (%)

W           15

X             25

Y             28.5

Z             48

Which strip would be longest after 4 hours?

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