<h3>Solution</h3>
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Class 11
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>>Transport in Plants
>>Plant-Water Relations
>>Carry out the following osmosis experime
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Carry out the following osmosis experiment:
Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
(a) Keep cup A empty.
(b) Put one teaspoon sugar in cup B.
(c) Put one teaspoon salt in cup C.
<h3>(d) Put one teaspoon sugar in the boiled potato cup D.</h3>
<h3>Keep these for two hours. Then observe the four potato cups and answer the following:</h3>
<h3>(i) Explain why water gathers in the hollowed portion of B and C.</h3><h3>(ii) Why is potato A necessary for this experiment?</h3><h3>(iii) Explain why water does not gather in the hollowed-out portions of A and D.</h3>
<h3>(i) Since sugar and salt was present in B and C respectively, water from the trough gathered in the hollowed portions of potato in B and C by the process of osmosis.</h3><h3>(ii) Potato A is necessary for carrying out this experiment because it acts as a control experiment. Control helps us to check what changes occurred during the course of the experiment and helps us to compare the results</h3>
<h3>(iii) Water does not gather in the hollowed portion of potato A as it was empty. Water also does not gather in the cup D because the potato used was boiled which makes it inactive as after boiling its protein structure were denatured, resulting in the disruption of the cell membrane.</h3>
