Problem: Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a salt solution become limp and soft. From this we can deduce that the cells of the celery stalks are a. hypotonic to both fresh water and the salt solution. b. hypertonic to both fresh water and the salt solution. c. hypertonic to fresh water but hypotonic to the salt solution. d. hypotonic to fresh water but hypertonic to the salt solution. e. isotonic with fresh water but hypotonic to the salt solution. 

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Problem Details

Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a salt solution become limp and soft. From this we can deduce that the cells of the celery stalks are 

a. hypotonic to both fresh water and the salt solution. 

b. hypertonic to both fresh water and the salt solution. 

c. hypertonic to fresh water but hypotonic to the salt solution. 

d. hypotonic to fresh water but hypertonic to the salt solution. 

e. isotonic with fresh water but hypotonic to the salt solution. 


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Our tutors have indicated that to solve this problem you will need to apply the Osmosis concept. You can view video lessons to learn Osmosis. Or if you need more Osmosis practice, you can also practice Osmosis practice problems.

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Based on our data, we think this problem is relevant for Professor Manz's class at ISU.