No.06 Determining water potential of potato tuber cells: the weighing method If a plant cell is in equilibrium with an external solution of such a concentration that there is not net loss or gain of water‚ the water potential of the external solution will be equal to the water potential of the cell. Use of this fact can be made in estimating the water potential of a plant tissue. Samples of tissue are immersed in a range of external solutions of different strengths. The solution that induces
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information below to complete the Osmosis Experiment. Materials 1 fresh baking potato Water Salt Four small containers (i.e.‚ drinking cups or clear glasses) A metric ruler Methods and Procedure 1) Place 1 cup (236 ml) of water in each of the 4 containers. In 2 of the containers‚ add 1 tablespoon (14.8 ml) of table salt and mix well until dissolved. Label which containers have salt. Cut a fresh baking potato into 5 mm slices. Cut four rectangles 2.5 cm x 1 cm from the slices as close
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minerals and water storing organic nutrients and other functions Absorption of water and minerals occurs near the root tips‚ where root hairs increase the surface area. Many plants have modified roots: Prop roots in mangrove Tubers in sweet potato and cassava Tubers are enlarge root or stem that acts as nutrient storage Aerial roots of the strangler fig tree Strangler fig use their roots to strangle their host to death Buttress roots large above ground roots surrounding the tree help to
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Living a Salty Life‚ http://www.lucasbrouwers.nl/blog/2009/11/living-a-salty-life/‚ date viewed: 10/03/13 Osmosis and The Water Potential of a Potato‚ http://biology.clemson.edu/bpc/bp/lab/110/osmosis.htm‚ Robert. J. Koninski‚ last update: October 2012‚ date viewed: 04/03/13 Potato in Osmosis Core‚ http://biology.clemson.edu/bpc/bp/Lab/110/handouts/Potato%20Osmosis%20OMP.pdf‚ date viewed: 02/03/13
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Viroids are plant pathogens that consist of a short stretch (a few hundred nucleobases) of highly complementary‚ circular‚ single-stranded RNA without the protein coat that is typical for viruses.[1] The smallest discovered is a 220 nucleobase scRNA (small cytoplasmic RNA) associated with the rice yellow mottle sobemovirus (RYMV).[2] In comparison‚ the genome of the smallest known viruses capable of causing an infection by themselves are around 2kilobases in size. The human pathogen hepatitis D is
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Chenneth S. Torres‚ Vincent Joseph P. Villaceran‚ Danielle P. Submitted to: Asst. Prof. Eufemio Barcelon Ph.D Submitted on: September 18‚ 2013 I. Results Rootcrop | % Alkaloid Average | Cassava | 95.17 % | Sweet potato | 82.51 % | Taro | 93.71 % | Potato | 91.68 % | Table 1. Determination of Alkaloid Raw Data Rootcrop | Weight of pre-weighed filter paper(g) | Weight of filter paper with ppt before drying(g) | Weight of filter paper with ppt after drying(g) | Weight of
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Practical Work Nº2: “Different methods to control osmosis” Aim: observe and test the process of osmosis through different kinds of methods: the weigh (potato)‚ the density (beetroot) and under the light microscope (onion). Hypothesis: according to the encyclopedia definition osmosis is the diffusion of a liquid (most often assumed to be water‚ but it can be any liquid solvent) through a partially-permeable membrane from a region of high solvent potential to a region of low solvent potential. Thus
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not intended to replace all conventional methods‚ but to provide a more reliable approach in achieving economic gains. Many new tools are now available‚ particularly from research in the areas of molecular biology‚ genetic engineering‚ and cell and tissue culture as well as from intensive application of microbial technology. The initiation of research and development in agricultural biotechnology dates back to the late 1970s when
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weight change in potato cubes 2) To determine the isotonic solution concentration for the potato Hypothesis: 1) If the concentration of the salt solution is higher than the concentration in the potato cubes‚ the percentage of weight change in potato cubes will be higher (positive). If the concentration of the salt solution is the same as the concentration in the cell‚ there will be no net movement of water through osmosis therefore there will be no percentage of weight change in potato cubes 2) The
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Exercise 1 – Potato Change in Mass versus Sucrose Concentrations Introduction: This exercise involves estimating the osmotic concentration of potato tuber cells by using a change in mass method. The null hypothesis states that there will be no change of mass of the potato disks after they have been incubated in any sucrose solution. This means that the concentration of sucrose that the potatoes are in will no effect the movement of water in or out of the potato cells. However‚ the alternative hypothesis
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