hydrilla breathe from what?
414488
um! thru the stomata?
761847
Some of them are buoyant and sleep floating on the surface breathing air. Others can do what in humans is comparable to the "dead man's float" where you are under the water motionless then tilt your head back only, rise to the surface to breathe, tilt it back and resubmerge. Hippos can do this without ever waking up so I assume some marine mammals can too.
227115
air is moved into the lungs
730114
ok, so generally speaking, in the hypotonic environment, a cell is swell up, and potentially burst. The way to remember this is that hypO (the letter O)tonic is the cell which is normally drawn as a more squarelike shape becomes circular as it takes on water. In an isotonic solution, the environment and the cell have equal solutes so no movement of water occurs. In a hypertonic solution (lots of particles in the environment) so the water leaves the cell and shrivels up. \nHowever, we also have to take into account the type of cell that we are placing into these environments. The above applies to animal cells and paramecium as they don't have rigid cell walls. However, plant cells do have cell walls so it does not apply to them. Plant cells have what we call turgor pressor, so they can withstand the environmental influences, or changes in tonicity, alot better. When the plant takes on water, it has the cell wall to prevent bursting. When the plant cell looses water, the cytoplasm shrinks while the cell wall keeps the cell's shape.\n\nQuestion 2:\nIf you were to place elodea or paramecium from fresh to salt water:\nwhen elodea is placed in salt water, we observe the process of plasmolysis - shrinkage of cell contents due to water loss.\nfor image see:\nhttp://images.apple.com/education/solutions/iwork/lessons/media/RealWorldScienceSample.pdf\n\nWith Paramecium: it has 2 contratile vacuoles that are used to balance salt concentration by expelling water
681008
Plants respire through stomata... valve-like openings on the underside of their leaves.
1173693
WoW Dude! Hydrogen and oxygen BOTH in water! Now that is just so new-age and just today right? \nDamn Man! If you and I could just figure how to separate the two...\nSorry got lost in the thought! Please submit your picture to Ripley"s...
71599
Well... as far as biology goes... no.  They don't need air... just oxygen.\n\nIf our bodies were capable of breathing in water to extract oxygen we'd do it... unfortunately, we cannot handle liquid in our lungs, hence the drowning bit.  We do get better gas transfer from water... however our bodies cannot generate the force to expell the liquid under normal breathing conditions.
284891
Living cells cannot absorb oxygen directly.  It has to be disolved in water.  Fish do not have any mechanism for disolving the oxygen in the air (they don't need it, since they live in the water), and so cannot survive on air.\n\nOur lungs have a lining of special mucous which is produced specifically to disolve oxygen and put it into a liquid so it can be used by our bodies.  It is remarkably similar to sea water... evolution has basically preserved the underlying transfer mechanism, and given us a way to carry our own little bit of ocean around with us!\n\nThe hylan membranes make this special fluid.  These membranes are not needed in the womb and so grow late in fetal deveolpment; hylan membrane disease results when a child is born before these membranes are fully developed, and they are at risk of suffocating in the air, just as a fish would.
878042
As the temperature of a liquid increases, the less gas it can hold dissolved. If you set a cold glass of water on the counter, it contains dissolved air. That is what th fish breath, dissolved air. As it warms less air can stay dissolved, so it comes out of solution on the side of the glass.\n\nIt is not the H or O from H2O
628242
Plants.\n\nThey breathe in CO2 and breathe out Oxygen
189813
Yes gasses in the air (oxygen, nitrogen, CO2, etc.) dissolve in the water (hence the fish and algae breath). Also many pollutants also dissolve in water (much easier than the gasses). If they are present in the air they will dissolve in the water, either by transfer (just the pollutants, not the gasses) or with the gasses.
311098
Not very much.  The water pressure on your body would prevent you from being able to bring in air that is at normal atmospheric pressure.  You need a compressor on the surface and a hose to breath from.
828613
You breathe it out as carbon dioxide.  You also probably lost some water weight through evaporation and urination.
200350
i think hydroblasting is h2o (water)
201286
thru gills ..they absorb oxygen frm the water n release the water thru gills
1041403
Spirogyra does not breathe per say.  It respires, which is an energy conversion process that takes place in the cytoplasm and mitochondria of its cells.  It also takes in oxygen from its surroundings through the process of diffusion.  Since it is a photosynthtic organism it also takes in carbon dioxide and water to form its own food.   So It also receives oxygen from the water that is destroyed as it is used in the photosynthetic process.
97554
Dude plants and algea, planton converting carbon dioxide to oxogen in photosythesis. Plus those weird bacteria in the ocean that can do it without light in darkness.