Hypo Hypertonic question

[Farcus]

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Ok during the day, the environment of the guard cell is
A)hypertonic relative to cell's cytoplasm
B)hypotonic relative to cell's cytoplasm
C) isotonic relative to cell's cytoplasm
D)None of the above

ok i know water move from hypo to hyper, and during the day there is lot of transpiration that occur in the underside of the plant. So by this I was gonna assume that during the day the environment of the guard cell is HYPERtonic to the cell itself since water is obviously going out of the cell during the day. however the answer is B, and the only conclusion I can come up with is that during the day in order for guard cells to be turgid they require lots of potassium follow by H20, so that the increase in H2o make the cell actually hypotonic to its environment but going with this, it would also mean that the environment itself is hypertonic.

 

[Farcus]

anyone? lol 😱

 

[AsuKa]

i don't even know what a guard cell is ? 🙁

never saw it in any of my review materials..

edit: yea upon wiki'ing i saw it's that type of cell in plants for photosynthesis / respiration / etc.

c3 c4 cam, yea ecology was like 1 year ago. i'm not touching that lol :| plus i don't even think we really need to know that. if you understand the general idea of tonicity youre fine.