potato tissue water potential. In this concentration there was no net gain or loss of water from the tissues. 4F- The hypothesis was supported because when the onion cell was placed in 15% NaCl‚ it went through plasmolysis and the cells because to shrink and the purple coloring have wider distance from each cell walls. However‚ as the onion cell was placed in freshwater the water moved in reached equilibrium‚ balancing everything and returning the cell back to its original
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Osmosis and Diffusion Title: Diffusion and Osmosis AP Lab 1 Purpose: The purpose of this activity is to determine the effects of a selectively permeable membrane on diffusion and osmosis between two solutions separated by a membrane. Hypothesis: Procedures: In lab manual Material: In lab manual Background Information: Data: Table 1 Diffusion of glucose and iodine. | Color | Glucose | Time | Dialysis Bag | Beaker | Dialysis Bag | Beaker | Start | | | | | 30 minutes
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there will be no net movement. (Water crosses the cell membrane but the amount going in is the same as the amount coming out‚ so there is no net movement‚ When the cell is in this state between turgidity and flaccidity‚ It’s called Incipient Plasmolysis. Osmosis is a form of passive transport‚ passive transport doesn’t use energy‚ the molecules go down a concentration gradient. Active transport is the opposite it uses ATPase for energy‚ and molecules move against a concentration gradient.
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OSMOTIC POTENTIAL OF CELL SAP OF PLANT EPIDERMAL CELLS Aim: The purpose of this experiment is to investigate the effects that the molarity of the sucrose solution and distilled water have on the plasmolisys of epidermal cells of a red onion. Hypothesis: Taking in consideration osmosis‚ and my knowledge about it‚ my prediction is that as the molarity of the solution under which the cells are exposed will increase‚ also the amount of plasmolysed cells‚ counted from amount of undamaged cells
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to dilute the higher concentration. Therefore‚ we say that hypotonic solutions have a lower solute concentration and a higher water potential. The net movement of water in a plant cell can be described using the two terms‚ turgor pressure and plasmolysis. Turgor pressure refers to the pressure of water exerting against
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Observing osmosis‚ plasmoylsis and turgor in plant cells Investigation * Get a single layer of plant cells. If you are using red onion‚ cut a 1 cm square from a fleshy piece of onion and then peel off a single layer of the red cells. If you are using rhubarb‚ peel a piece from the epidermis. If you are using toadflax peel a piece of the lower epidermis of a leaf. * Place the strip on a slide and cover it with a drop or two of distilled water. Add a cover slip. * Look at the cells through
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TERM – 1 SYLLABUS 2012-201– 1 SYLLABUS 2012-2013 CLASS XI (SCIENCE) Subject Topic Practical English 1. Hornbill – The Portrait of the Lady‚ a photograph Snapshots – The Summer of the beautiful white horse The Canterville ghost – Chapter 1 Writing – Article writing‚ Note making Grammar -Determiners 2. Hornbill – We are not afraid to die if we can be all together Snapshots – The address The Canterville ghost – Chapter 2 Writing – Speech writing Grammar – Tenses 3
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Diffusion and Osmosis Table of Contents Lab # 1 Experiment Components Experiment Requirements Background Information Experiment Procedures Experiment Overview PART A. Diffusion and Dialysis PART B. Osmosis PART C. Water Potential PART D. Onion Cell Plasmolysis Study Questions Instructor ’s Guidelines Notes to the Instructor Pre-Lab Preparations Experiment Results and Analysis Study Questions and Answers Material Safety Data Sheets Page 3 3 4 10 11 12 16 20 21 23 24 26 29 31 Advanced
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Stacy Hernandez Period 1 Mrs. Riley AP Biology Osmosis and Diffusion Lab I. Introduction: Diffusion is vital to many life functions of a cell‚ it allow the transportation of vitally important nutrients and compounds without the expenditure of excess metabolic energy. To explain diffusion‚ it is as if a bottle of perfume is opened at one end of the room‚ then in a short amount of time a person at the other end of the room can detect the scent of the perfume; this is the process of diffusion
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Through this experiment‚ Egeria densa was observed using a microscope. The task was to observe and identify the different types of cell‚ cytoplasmic streaming‚ and plasmolysis of Egeria densa. First‚ the microscope was examined and investigated to master the use of the equipment. A microscope slide grid which was on the slide glass was required to be seen clearly using 4x‚ 10x and 30x. During the latter part of the experiment‚ the Egeria densa was observed using the microscope to understand the
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