Measuring the Water Status of Potato Tubers Objectives: Upon completion of this laboratory you should be able to: 1. determine the water potential of a plant tissue by the Chardokov and gravimetric techniques and understand the underlying theory. 2. determine the osmotic potential of a plant extract by the freezing point depression method and understand the underlying theory. 3. describe techniques for measuring the pressure potential of a plant tissue. 4. describe techniques for measuring
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of goggles and put them on and make sure hair is tied up‚ if long‚ using any sort of hair band. Take the 100ml glass beaker and place it under the water tap’s opening‚ the place where the water comes out from‚ then turn the tap on. Do not turn the tap off until the water inside the beaker reaches the 50ml mark‚ to ensure that there is only 50ml of water in the 100ml beaker. Then take the beaker and place it somewhere safe on the table. After that take the scale and plug it’s wire in the socket‚ then
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fluid where they are supported g. Colloidal dispersion: a colloid that has continuous liquid phase in which a solid is suspended in a liquid. 5. How do you classify the four mixtures used: a. Salts and water b. Clay and water c. Mineral oil and water d. Gelatin and water ORGANIC AND INORGANIC COMPOUNDS 6. List below the substances which were heated and indicate which left a black residue in the test tube‚ showing that they are organic Substance:
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Gymnosperms Uses of Plants Example Angiosperm/Gymnosperm Food Rice Angiosperm Beverage Tea Angiosperm Medicine Aloe Vera Gymnosperm Fibers Paper Gymnosperm Materials Wood Gymnosperm Dyes Colorado Fir Gymnosperm 5. Review the introduction to Lab Topic 15 plant diversity 1 and describe the major trends in the evolution of land plants. The major trend is leaning toward the sporophyte dominating the life cycle‚ which means the gametophyte is decreasing. The reason why sporophyte might be dominating
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Cell Worksheet from Chaiken of Biology Cell wall cell membrane nucleus ribosome lysosome mitochondria cilia flagellum vacuoles chloroplasts 1. This organelle takes sunlight‚ water and carbon dioxide and can make organic food molecules and oxygen. Chloroplast 2. This organelle is constructed of cellulose and supports plant cells and prevents them from blowing up. Cellulos 3. This organelle contains enzymes for intracellular hydrolysis of food molecules. Lysosom 4. This organelle takes
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an initial height of 4 feet at an initial velocity of 350 feet per second. The gravitational force of Earth is pulling the rocket down at a rate of 16 feet per second per second. The formula for‚ s(t)‚ for the function that models the height of the water balloon at time t‚ in seconds‚ is s(t)= -16t2 + 350t + 4. We can determine how long it takes for the rocket to land from the graph where the function intercepts the x-axis because this is the value where the height of the rocket is 0 feet. From the
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generation to the F2 generation. Concerning how the experiment is actually performed‚ five Wisconsin fast seeds are planted into a cup full of soil and six fertilizer seeds. The seeds are then covered with more dirt and connected to a cup full of water through a wick. The soon to be plant is then placed under light for 24 hours. After this the plants with the highest amount of trichome numbers are found and kept. When flowers are present‚ the selected plants are cross pollinated with a pollinating
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Lab Topic: Movement of Materials Across the Cell Membrane—Potato Tuber Cells Introduction: Osmosis is a form of diffusion in which water diffuses through a selectively permeable membrane from a region of high concentration to a region of lower concentration. This form of diffusion takes place when the molecules in high concentration are too large to move through the membrane. Three factors that determine cell membrane permeability are shape‚ size‚ and polarity. For this experiment‚ it must
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the environment in your region? Some of the probable sources of acid precipitation is Fog‚ and rain. During the summer it hardly rains which makes it hard for our crops to grow‚ also since we are in the valley it makes it hard for us to get the water that we need. During the fall it gets very foggy in the mornings and it makes it very difficult to see while your driving. Prevailing winds can also transport the acid precipitation from these sources to areas downwind‚ which is an example of valley
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OSMOSIS Aim To determine the water potential of potato tuber cells. Background knowledge Osmosis is defined as the movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane. Osmosis is considered in terms of water potential and solute potential. Water potential is a measure of the kinetic energy of water molecules. Here‚ water molecules are constantly moving in a random fashion. Some of them collides with cell
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