7th Class Science Transportation in Animals and Plants Question Bank Transportation in Plants and Animals

  • question_answer Mukta conducted an experiment in which two potato tubers X and Y (of equal size) were peeled and a cavity was made in each of them. X was boiled while Y was not. The cavities in the both tubers were filled with sugar solution and they were then placed in beakers containing distilled water. Select the correct statement regarding the result of this experiment.

    A)  Level of sugar solution increased in both potato tubers X and Y due to osmosis.

    B)  Level of sugar solution decreased in both potato tubers X and Y due to osmosis.

    C)  Level of sugar solution increased in only potato tuber X due to osmosis.

    D)  Level of sugar solution increased in only potato tuber Y due to osmosis.

    Correct Answer: D

    Solution :

    In the given experiment, X has non-living cell while Y has living cell. There will be no change in the level of sugar solution in potato tuber X while sugar solution level increases in potato tuber V due to osmosis. It is because concentration of water molecules is more outside the potato than inside it, as the inside solution has sugar dissolved in water. Therefore, water moves from beaker to the potato cavity.

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