Osmosis In Potato Cells Apparatus: The apparatus used in this experiment were: 1) 5 beakers‚ 2) 3 large potatoes (same type)‚ 3) 15 pieces of potato without skin (roughly the same size)‚ 4) 10 pins‚ 5) 50ml of distilled water‚ 6) 50ml salt solution 0.50‚ 7) 50ml salt solution 1.00‚ 8) 50ml salt solution 1.50‚ 9) 50ml salt solution 2.00 10) Scales‚ 11) Knife‚ 12) chopping board‚ 13) cork borer‚ Prediction & Theory: When the potato pieces are put in to the water there are more water molecules
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membrane function as ion channels? Intergral Proteins 2. Ion channels are selective for specific ions. What three characteristics of the ions are important for this selectivity? a. Charge on ion (+ or -) b.Size c. The amount of water the Ion attracts 3. Channels can be classified as either gated or nongated channels. A sodium channel that is always open would be classified as a/an non-gated channel. 4. Would sodium ions move into or out of the neuron through these channels
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Homosexual Adoption Our world today is full of unsolved and controversial issues. Most of them relate to our morals‚ ethics‚ and religion‚ creating a very strong yes and no or good and bad side. The idea in society is to raise children with a man and a woman. Every child in an orphanage dreams about being loved by parents. Although it may be argued that the current adoption policy is too specific‚ I believe that same-sex adoption should not be allowed into the adoption process. By providing an
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Who is Claes Oldenburg? Claes Oldenburg is an American sculptor‚ best known for his public art installations typically featuring very large replicas of everyday objects. Another theme in his work is soft sculpture versions of everyday objects. Where is he from? Claes Oldenburg is from Stockholm. Stockholm is the capital of Sweden. Stockholm is the most
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Kheng Horng Gan Edwin IS-240.009‚ Disc6 2/23/14 Questions 2 – Evaluate the advantages of the relational database model A relational database model has many advantages such as increase flexibility‚ increase information security‚ increase scalability and performance‚ increase information integrity (quality)‚ and reduce information redundancy. Firstly‚ most of the companies use database because it can handle changes easily and quickly. There are two views used to understand the flexible database
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movement of water molecules across a semi-permeable membrane is the process of osmosis. If there is a solute and a solvent‚ each containing different concentration levels‚ then the water would move along its concentration gradient until each side of the membrane are equal. The water moves because the membrane is impermeable to the solute and the solute concentrations may differ on either side of the membrane. Water molecules may move in and out of the cell‚ but there is no net diffusion of water. Water
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concentration in electrolytes on the potential difference in a voltaic cell Introduction When two electrodes made of different metals are connected together in a voltaic cell‚ the chemical energy present is converted into electrical energy and an electromotive force is generated. This force‚ called the electrode potential‚ is normally measured under standard conditions‚ which is 298K‚ 1 mol dm-3 solution for the electrolyte. However when one measures the electrode potential in a voltaic cell‚ the conditions
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SEX DETERMINATION IN FORENSIC ODONTOLOGY Identification of living beings and dead bodies is of great importance in Forensic science. Sex determination is one of the important steps in establishing identity. Sex identification in international sports: In 1932 Helen Stephens and Stella Walsh: Hitler’s Olympics In 1936 Stella accused Stephens of being male and so a crude physical examination including gross physical examination of external genitalia was done. In 1966 gender identification became
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impactful waves of immigration to the United States occurred as a result of the Irish Potato Famine. The famine occurred due to failure of Ireland’s potato crop in 1945 through 1949 (Mokyr 1). Although the famine lasted four years‚ its effects can still be seen in the United States. The influx of Irish immigrants served as the backbone of the industrializing United States and forever changed the nation. Despite the Irish Potato Famine’s impact on the United States‚ it could have been avoided if other nations
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Using Sucrose Solutions to Determine Osmolarity of Potato Tubers Based on Weight By Thomas Pelikan Biology 200A Section 004 Kimberly Schmidt October 2‚ 2012 Abstract: In this experiment we were trying to determine the osmolarity of potato tubers by weighing them before and after incubating them in solutions of sucrose with varying molarities. To find the osmolarity we took a potato and used a cork borer to obtain seven samples of potato tubers. We then prepared seven beakers with concentrations
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