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BIOLOGY

JAMB 2004 - Question 16

Biology 2004 JAMB Past Questions - Question 16: Which of the following results is to be expected if the set-up is left for several hours?

use the diagram below to answer the questions 15 and 16

Which of the following results is to be expected if the set-up is left for several hours?

A: decrease in the size of the yam

B: movement of the salt solution into the water

C: decrease in the volume of water inside the yam

D: movement of water from the salt solution into the yam

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Correct Answer

Explanation

C - The decrease in the volume of water in the yamcavity is as a result of osmosis. The salt solution in the beaker is of higherosmotic concentration than water and there exerts highter osmotic pressure thatdraws water.molecules from the yam cavity across the soil membrane that actsas semi permeable membrane.