What forces might act in living systems to generate water potential and provide examples of each?
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I hope i understand your question-\nForces: Osmosis = 1\n              Facaltative diffution =2\n               \n2.Thier is the NA/K pump in cell membranes that control water level\n1.The albumin in tissues that regulates homeostasis\n1 and 2.There is the CL pump that also regulates water in the cell membrane. \nThink those are the main ones
230448
dipole-dipole\nhydrogen bonds\nlondon forces\n\nde nada
956248
The hydrostatic pressure is generated by the pumping force of the heart. It pushes water out of the capillaries.\n\nThe water potential is created due to the inability of large solutes to pass through the capillary walls. This buildup of solutes induces osmosis. The water passes from a high concentration (of water) to a low concentration in an attempt to reach an equilibrium. This draws water back into the vessels. Because the blood in the capillaries is constantly flowing, equilibrium is never reached.\n\nThe balance between the two forces is different at different points in the capillaries. At the arterial end of the vessel, the hydrostatic pressure is greater than the water potential, so the net movement (see net flux) favors water and other solutes being passed into the tissue fluid. At the venous end, the water potential is greater, so the net movement favours substances being passed back into the capillary. This difference is created by the direction of the flow of blood, and the imbalance in solutes created by the net movement of water favoring the tissue fluid
903593
Crystal Energy et Active H\n\nSouriez à la vie et la vie vous sourira. ^---^
788768
Just the usual stuff.  Use an electrolyte (H2SO4/HNO3), a couple of electrodes, a reduction table of half cell potentials, and some electricity.
95223
forcing water away because they are polar molecules
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In Photosynthesis, plants use the sun's energy as light to transform carbon dioxide and water into glucose.  In cellular respiration,  glucose is ultimately broken down to yield carbon dioxide and water, and the energy from this process is stored as ATP molecules.
517414
There is a finite amount of energy in the ecosystem, regulated by the amount of sunlight plants can convert to usable forms of energy.  As you go up the food chain, a bit of this energy is lost at each level, meaning that at or above a certain trophic level, the energy input is insufficient to support an organism.  It's pouring water from bucket to bucket... You're going to spill some each time, and eventually, none will be left to pass on.
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Heat would an obvious example. The laws of thermodynamics would be another.
421576
Here's an interesting article that explains a little about how surface tension works in droplets.\n\n\n"Surface Tension in Water Droplets \nIntermolecular forces create the surface tension that causes these water droplets on leaves to bead up and form the smallest surface possible. The water molecules at the surface are pulled in by the cohesive force between themselves and molecules inside the droplet. The water keeps its droplet shape because there are no water molecules outside the surface to balance this inward pull. "\n\nhttp://encarta.msn.com/media_461560536_761563983_-1_1/Surface_Tension_in_Water_Droplets.html\n\nHere's another resource,\nhttp://en.wikipedia.org/wiki/Surface_tension
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The effect of "Water Displacement" on binding thermodynamics.
256189
Assuming that the fluid increase is due to an increase in water, the cells will expand due to the water moving down its concentration gradient.
261005
Apparently groups in Sweden, Australia, and the UK are working on this. There are probably others as well. They are making progress. It does appear that this might allow the industrial scale separation of water into hydrogen and oxygen, and the reduction of atmospheric CO2. \n\n\nRecently, Jim Barber and So Iwata of Imperial College in London identified the actual crucial molecules that are used to split water by plants. This might lead to huge advances eventually. It is quite exciting.
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When you run amps of current through conductive water, such as salt sea water, the water will interact with a magnet.  The caterpillar drive which pumps water through a tube with a an electric field through the water and a moving magentic field to create a jet of water is actually possible.  The water, however, is only acted on by a magnet as long as the electric current is flowing.  When the electric current stops, the water is disorganized and is unaffected by a magnetic field.  (Water molecules, however, are slightly polar, being slightly positive on the 2 hydrogen on the end, and slightly negative on the oxygen end. Note that this is a STATIC electric field, not a magnetic field!!!!)\n\nForce=ExB.  The electric field crossed with a magnetic field creates force.  Similarly an copper wire is not a magenet either.  Yet when an electric current is flowing through it, and it intersects a changing magnetic field, it will create a force on the wire.  Also, a changing electric field in a wire will induce a changing magnetic field in a magnetic material, like iron.  \n\nBoy I hope I haven't muddied the waters;  let me summarize: water CAN support an electric field through it, and hence be acted on by a magnetic field.  Changing the electric field in water can induce a changing magnetic field in a magnetic material.  Water, in itself, IS NOT, and CANNOT be magnetic, ever.  If you put iron particles in it, the iron particles will be magnetic.  Other metallic salts, sodium, calcium and the like will NOT make the water magnetic, only conductive.
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1)water\n2)sun light\n3)Mineral nutrients\n4)Oxygen\n5)CO2\n6)Optimum Temperature\n7)Less Competition\n8)Ecological adaptations\n9)Soil or good substratum\n10)Role in local ecosystem
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http://www.sciencebuddies.org/mentoring/project_ideas/home_Phys.shtml?gclid=CNDljtrK6IgCFQ7eSgodNw4Ssg\n\nthere are MANY projects available getting more complex as you come to the bottom of the page.
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Water provides more force than air because it is\ndenser and thus has more mass:\n\nF = ma \n\nd = m / volume