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  1. #1 Odd man out 
    ritwik07
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    Default November 2nd, 2007, 08:01 AM
    Plasmolysis, diffusion, osmosis, imbibition

    My Reason: its the shrinkage of cell. The rest are process involved in the transport of water


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    spuriousmonkey
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    November 2nd, 2007, 08:06 AM
    isn't plasmolysis osmosis, but then selective?


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    KALSTER
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    November 2nd, 2007, 08:11 AM
    Diffusion is passive
    Disclaimer: I do not declare myself to be an expert on ANY subject. If I state something as fact that is obviously wrong, please don't hesitate to correct me. I welcome such corrections in an attempt to be as truthful and accurate as possible.

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  5. #4  
    ritwik07
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    November 2nd, 2007, 08:47 AM
    Quote Originally Posted by spuriousmonkey
    isn't plasmolysis osmosis, but then selective?
    I dont think so. Plasmolysis is the phenomenon of shrinkage of cell. Osmosis is the movement of water molecules through semi- permeable membrane.
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    paralith
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    November 2nd, 2007, 08:49 AM
    plasmolysis is something that happens to plant cells. if the environment surrounding a plant cell is too hypertonic, then as we all know all the water will leave the cell via osmosis. This causes the cell to shrink and to break away from the cell wall. The overall effect on the plant will be wilting.

    Yes, it is the shrinkage of the cell, but it is caused by water movement.
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  7. #6  
    ritwik07
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    November 2nd, 2007, 08:57 AM
    Quote Originally Posted by paralith
    plasmolysis is something that happens to plant cells. if the environment surrounding a plant cell is too hypertonic, then as we all know all the water will leave the cell via osmosis. This causes the cell to shrink and to break away from the cell wall. The overall effect on the plant will be wilting.

    Yes, it is the shrinkage of the cell, but it is caused by water movement.
    So can I mark plasmolysis as the odd one out?
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    paralith
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    November 2nd, 2007, 09:07 AM
    Plasmolysis: the shrinkage of the cell due to osmosis

    Osmosis: the diffusion of water across a semipermeable membrane from a region of low solute concentration to a solution with a higher solute concentration (thanks Wikipedia)

    Diffusion: the spontaneous net movement of particles from an area of high concentration to an area of low concentration (thanks again Wikipedia)

    Imbibition: the displacement of one fluid by another immiscible fluid; in other words, why wood and/or seeds swell when placed in water (thanks yet again wikipedia)

    Three of these involve processes related to diffusion. One of these does not. This is obviously a homework question of some kind. And as you can see, the answer was easily obtained by looking things up on wikipedia. In the future, a lot of homework questions can be answered on your own with online research.
    Man can will nothing unless he has first understood that he must count on no one but himself; that he is alone, abandoned on earth in the midst of his infinite responsibilities, without help, with no other aim than the one he sets himself, with no other destiny than the one he forges for himself on this earth.
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  9. #8  
    spuriousmonkey
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    November 2nd, 2007, 09:13 AM
    Imbibition

    awful word though.

    I would not like to be the man/woman who invented that one.
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