the movement of water across a membrane. It always navigates to the area of the membrane with a higher solute concentration. We take a closer look at the effects of osmosis in this lab through the examination of red blood cells (sheep)‚ plant cells (elodea)‚ and active transport in yeast. Under the microscope‚ we can determine the effects on plant and animal cells exposed to hypotonic‚ hypertonic‚ and isotonic sodium chloride solutions. Plant cells have a cell wall; however‚ animal cells do not. This
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Tropical Rain Forest and Tropical Grassland1 I. Objectives The following are the objectives of the study: 1. To describe the plant species composition of a tropical forest and tropical grassland found in Mt. Makiling; 2. To compare the diversity indices of the two sampling sites. 3. To identify the most dominant species and rarest species in each site. 4. To identify the disturbances acting on the two sampling sites. II. Methodology
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John Leone Lab Partner(s) Ethan Davis & Ryan Hanna Date: 12/10/14 Instructor: Dr. Chuckran Period: H Plants and Animal Cells Abstract: In this lab‚ you will find out how plant and animal cells are alike and how they are different. The onion elodea cells were both plants‚ so they had a cell wall. The cheek cells were animal cells‚ so they did not have a cell wall. Eukaryotic cells contain structures called organelles that carry out life processes. Eukaryotic cells can be classified by the types of organelles they contain
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indicated that the water molecules indeed move from high concentration to low concentration‚ while solutes do the same if the membrane is permeable to them. This was evident through our experiments in which membrane permeability was tested in living Elodea plant cell‚ which was placed in 3 different solutions‚ from distilled water to 15% NaCl solution‚ to test how the cell would react to it. In addition‚ dialysis tubes were used in water and maltose solution to test for osmosis‚ since they have an
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water. The eggs appearance was observed and recorded. Part 11. An elodea leaf cell is observed with salt solution‚ and without salt water but with distilled water. Observations on appearance and changes were recorded. Results: Part 1. The Mass of the egg increased and the volume of the egg decreased in both Vinegar and Water solutions. The mass of the egg decreased and the volume increased in the syrup solution. Part 11. The elodea leaf cell gets larger when distilled water was added compared to
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culture solution provided. Obtain the three organisms (fish and elodea) one beaker will be used as a control beaker. Obtain the volume of each organism by filling a graduated cylinder with 25 mL of water and noting if there is an increase in volume above the 25 mL line. Record volumes in table. After placing the organisms in their proper beakers cover each beaker with plastic film or petri dish. Cover the beaker containing the elodea with a coffee can or aluminum. Allow them to respire for about
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Diffusion and Osmosis Experiment Methods/Materials: 7.1 Experiment: Rate of Diffusion of Solutes In the initial set up of this experiment I had 2 sets of 3 screw-cap test tubes that had each been half-filled with 5% gelatin and 1-mL of the correct dye (either potassium dichromate‚ aniline blue‚ or Janus green) in each of the test tubes. I labeled the 3 test tubes of set 1 with which die they contained and marked them “5 ˚C”. Then with the other set I did the same exact thing‚ except I labeled
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Rate of Osmosis vs Solute Concentration Introduction: In nature‚ the quest to reach equilibrium‚ or the state of rest or balance due to the equal action of opposing forces (http://www.dictionary.com). Osmosis and diffusion are two ways that cells reach this equilibrium‚ without exerting energy. Due to the unique nature of the phospholipid bilayer‚ small molecules can pass through the semipermeable membrane easily‚ through diffusion (https://www.biologycorner.com). Water‚ however‚ has a slightly more
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The purpose of this lab was to determine the concentration of NaCl or sodium chloride that is isotonic to elodea cells. First off‚ what is osmosis? Osmosis is this huge net of molecules moving through semi-permeable membrane to high concentration to direction where everything becomes balanced. This brings us to what osmolality is. Osmolality is related to osmosis and we know that osmosis has something to do with water so that being said‚ osmolality is number of osmoles of solute per liter in solution
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SST 242: PRINCIPLES OF SEED PRODUCTION Lecture Two Title: Vegetative Propagation Introduction Man has propagated plant material almost as long as he has cultivated the land to produce food. For a long time‚ plant material was propagated mainly by using the seeds of existing plants. Better methods were discovered over time‚ methods that allowed the farmer to retain the desirable qualities of the plant material‚ while eliminating some of the less desirable qualities. Through these methods‚ the
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