The process of osmosis and its importance to living organisms Osmosis is the process by which there is a net movement of water through a semi permeable membrane from an area of high water potential to an area of low water potential. Within a cell‚ osmosis has the following effect. If the water potential of the cell is lower than that around the cell water will move across a concentration gradient into the cell. If this is the case‚ the increase in water in the cell‚ may cause the cell to swell
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BIOLOGICALLY IMPORTANT MOLECULES Abstract Compounds containing the element carbon‚ called organic compounds‚ are the most important substances that make up living organisms. There are thousands and thousands of different organic compounds. To identify the major types of organic compounds in living organisms ‚ several biochemical test were used . Introduction Organic molecules are those primarily made up of carbon‚ hydrogen and oxygen. The common organic compounds of living organisms are
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moved from osmometer X to osmometer Y during the course of the experiment. Explain this observation according to the mass flow hypothesis. (3 marks) (ii) Explain the function of tubing M in this model. In plants‚ which tissue serves the same function as tubing M? (3 marks) (iii) Indicate which osmometer represents photosynthetic mesophyll cells in plants during the growing season. Explain your choice. (1 mark) (iv) If a small amount of invertase is added to osmometer
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use any of the other factors that we discussed with the others was because‚ me and my Partner disagreed on using any of the other factors‚ and that’s why I have chosen to stay with this factor. |Water Concentration in ml |Concentration of Sucrose in ml|BEFORE |AFTER | |50 |5ml |0.90 |0.80 | |50 |5ml
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Examining Diffusion and Osmosis Introduction: Purpose: 1. To simulate and observe the diffusion of solutes and the osmosis of water through a semipermeable membrane through color change and sugar tests. 2. To speculate osmosis occurring in dialysis bags and potato cores by comparing percentage change in masses. Background information: Molecules are always in random‚ constant movement due to their kinetic energy. This causes the molecules of a cell to move around and bump into each other
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mycorrhizae‚ which increase the surface area and therefore increase the absorption. The endodermis‚ which is the innermost layer of cells in the root cortex‚ surrounds the vascular cylinder. It is the passage of minerals from the cortex into the vascular tissue. The stem has a system of nodes where leaves are attached. They have a waxy coating (epidermis) that prevents water loss. The stem and the roots are the 2 main axes in a vascular plant. Fluids are transported between the roots and the shoots through
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Northern Kentucky University BIO 150L: Introduction to Biology I Instructor: Dr. Bethany Bowling Osmosis and Diffusion Report Estimating the Osmolarity of Plant Cells--Potato YAO ZHANG 03/26/2012 Introduction: It is undeniable that all cells have the kinetic energy. It will led the cells move randomly around to others. For this molecular movement‚ there are two results that might happen. Diffusion is one of them. Diffusion is the movement of molecules that between the
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this experiment‚ there were four onion bulbs labeled A‚ B‚ C‚ and D. Bulbs B‚ C‚ and D were each immersed in a different concentration of coffee. Bulb A acted as the control because it was not immersed in any concentration of coffee; instead‚ the onion roots grew in water. The following is a list‚ in order‚ of the concentration of caffeine bulbs B‚ C‚ and D were in: 0.1%‚ 0.3%‚ and 0.5%. Four test tubes were gathered to set up the experiment‚ each holding an onion bulb. After each day‚ every individual
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in xylem and phloem tissue. Parts of Plants: Roots Structural support & transports by taking in water & nutrients‚ process of diffusion Root Hairs – Increase S/A‚ are extension of epidermal cells Stems in vascular tissue‚ which is made of xylem & phloem. Xylem – transports water & dissolved minerals Long tubes made up of series of cells. From roots upwards to leaves; useable for tree with maximum height. Phloem – transport sucrose‚ produced in photosynthetic tissue to other regions of
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all resulted in blue solutions‚ which is what we started with‚ this meant that these substances did not contain reducing sugars. Sucrose changed slightly‚ indicating that‚ while very low‚ there was some presence of reducing sugars. Pine apple juice turned a dark yellow/ green color‚ also indicating a low presence of reducing sugars. Corn syrup‚ non-diet soda‚ and onion juice all turned a yellowish brown‚ meaning that these solutions contained a moderate amount of reducing sugars. Potato juice and
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