Hypothesize why plants grow better when the water surrounding their cells is slightly hypotonic to the cell.?
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Given that water in an hypotonic environment would tend to enter the cell, causing it to swell, it would constitute an expanding force aiding cell´s growing. Think of a baloon when you blow air into it: it kindda grows.
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In a hypotonic solution, the concentration of solutes on the inside is HIGHER than on the outside, so to equilibrate this, the cell must allow either the solvent to flow in or it must transport the solutes out of the cell.  In an experiment, there is no active transport, so the only way to equilibrate the concentrations on the insides and outsides of the cell is by osmosis, the diffusion of water.  In a hypotonic solution, water will flow into the cell, and if the cell cannot contain it, then it will lyse.\n\nA hypertonic solution is when the concentration on the inside is LOWER than the outside, the it's the vice versa of the hypotonic solution situation above.\n\nAn isotonic solution means that the concentrations are equal, so the rate of water flowing in is equal to that of the rate of water flowing out.
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Plants have small openings on the underside of their leaves called stomata. The roots pull in water and it travels up and out the stomata. The lower humidity outside the plant pulls the water out.
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Animals have a circulatory system that transports fluids, chemicals, and nutrients around within the animal body. Some plants have an analogous system: the vascular system in vascular plants; trumpet hyphae in bryophytes.\n\nRoot hairs are thin-walled extensions of the epidermal cells in roots. They provide increased surface area and thus more efficient absorption of water and minerals. Water and dissolved mineral nutrients enter the plant via two routes. \n\n\nWater and selected solutes pass through only the cell membrane of the epidermis of the root hair and then through plasmodesmata on every cell until they reach the xylem: intracellular route (apoplastic). Water and solutes enter the cell wall of the root hair and pass between the wall and plasma membrane until the encounter the endodermis, a layer of cells that they must pass through to enter the xylem: extracellular route (symplastic). \n\n\nThe endodermis has a strip of water-proof material (containing suberin) known as the Casparian strip that forces water through the endodermal cell and in such a way regulates the amount of water getting to the xylem. Only when water concentrations inside the endodermal cell fall below that of the cortex parenchyma cells does water flow into the endodermis and on into the xylem.\nXylem and Transport \nXylem is the water transporting tissue in plants that is dead when it reaches functional maturity. Tracheids are long, tapered cells of xylem that have end plates on the cells that contain a great many crossbars. Tracheid walls are festooned with pits. Vessels, an improved form of tracheid, have no (or very few) obstructions (crossbars) on the top or bottom of the cell. The functional diameter of vessels is greater than that of tracheids.\n\nWater is pulled up the xylem by the force of transpiration, water loss from leaves. Mature corn plants can each transpire four gallons of water per week. Transpiration rates in arid-region plants can be even higher. Water molecules are hydrogen bonded to each other. Water lost from the leaves causes diffusion of additional water molecules out of the leaf vein xylem, creating a tug on water molecules along the water columns within the xylem. This "tug" causes water molecules to rise up from the roots to eventually the leaves. The loss of water from the root xylem allows additional water to pass throught the endodermis into the root xylem.\n\nCohesion is the ability of molecules of the same kind to stick together. Water molecules are polar, having slight positive and negative sides, which causes their cohesion. Inside the xylem, water molecules are in a long chain extending from the roots to the leaves. \n\nAdhesion is the tendency of molecules of different kinds to stick together. Water sticks to the cellulose molecules in the walls of the xylem, counteracting the force of gravity and aiding the rise of water within the xylem. \n\nCohesion-Adhesion Theory\nTranspiration exerts a pull on the water column within the xylem. The lost water molecules are replaced by water from the xylem of the leaf veins, causing a tug on water in the xylem. Adhesion of water to the cell walls of the xylem facilitates movement of water upward within the xylem. This combination of cohesive and adhesive forces is referred to as the Cohesion-Adhesion Theory.\n\n\nGuard Cells Regulate Transpiration\nIn most environments, the water concentration outside the leaf is less than that inside the leaf, causing a loss of water through openings in the leaf known as stomata (singular = stoma). Guard cells are crescent-shaped cells of the epidermis that flank the stoma and regulate the size of the opening. Together, the guard cells and stoma comprise the stomatal apparatus. The inner wall of the guard cell is thicker than the rest of the wall. When a guard cell takes up potassium ions, water moves into the cell, causing the cell to become turgid and swell, opening the stoma. When the potassium leaves the guard cell, the water
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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.
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Yes. It does. Since there is more sugar in the water outside of the plant than there is in the water in the plant, the sugar solution will be hypertonic (higher concentration of solutes). This will cause osmosis to occur, causing water to flow out of the plant and into the sugar water to equilize the content. This will drain the vacuoles in the plant cells, and cause them to shrivel up inside of the cell wall.
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Others have answered the question with drinking salt water.  The stomatas are pores in leaves that regulate the absorption & evaporation of water, along with gas exchange.\n\nDepending on the evnironmental condition, stomata will open up if there's lots of moisture in envoronment to absrob extra water.  If environment is dry, stomata will close to conserve its water content by reduing the evaporation.\n\nEffects of salt water on stomata, I'm not very sure but it's sure to give a lot of stress on the plant.  Stomata will open up a lot more in wet condition, and close longer & tightly during dry condition.\n\nSo main thing is, that if you give plants salt water, it's like giving very little water.
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because flowers grow after the are watered.
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Their roots are actually specialized branches (rhizoids) that grow in the ground or into tree bark, on rock, etc. so the whole plant is actually living sideways.  The branches absorb water just like roots would. They have a great capacity for storing water, and most are pretty small, so they don't need as much rain as most plants, just humidity/moistness.  Most surfaces are wet with dew in the morning, and they absorb this.
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the tiny  root hairs  stick out of the root , they increase the surface area for more water absorption.
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As cells grow the surface area/volume ratio goes down.  This inhibits their ability to uptake nutrients.
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Dude / dudette.\n\nCheck your local search engine.\n\nWatch a plant in your garden, for gawdsakes.  Plants wilt without water, so it's a fair bet that water fills the cells - perhaps the cell walls?\n\nHere's a passage ripped off from a website:\n\nWater acts as a SOLVENT for minerals and stored food that must be moved through the plant. Water evaporation on the leaf surface helps cool the plant during very hot weather in the same way that perspiration keeps us cool. \n\nPlants even require water during winter. Water is absorbed through and stored in roots for winter. When soil is frozen, water movement is very restricted. On windy winter days, leaves of broadleaf evergreens, such as rhododendrons, may curl to reduce water loss. Curling reduces the amount of leaf surface exposed to drying winds, reducing evaporation. Continued water loss may cause tissue to die and turn brown. This kind of plant injury is called desiccation. It is critical that broadleaf evergreens have an adequate supply of soil moisture going into winter.
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It is because of a plant hormone and also becasue plants are sensitive to light moisture and gravity.  shoots or stamp grow towards light and against the force if gravity.  roots grow towards moisture and in the direction of gravity.\n\nIn the shoot, hormone collects on the lower side and stimualtes the growth of the cells on this side.  therefore the shoot grows upwards and away from the force of gravity.\n\nin the root, the hormone also collects on the lower side buts slows down the growth of the the cells on this side.  therefore the roots grows downwards and towards the force of gravity.
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Increase Co2 result in the more production of sucrose in the guard cells.That increases its osmotic potential.Water from adjoining cells rush in.Resulting increase in it's opening.
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gravity pulls water down and adhesion and cohesion hold water up. While gravity is a greater force, it helps to maintain a balance of water leaving the stomata.
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Because of osmosis (the diffusion of water through a membrane) the water will move from the higher concentration of water to the lower concentration of water. (From the solution with less sugar, to the solution with more sugar, because it has less water in it with the sugar taking up the space.)
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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