el A.) Cell theory : 1.) All organisms are made of cells. 2.) All existing cells are produced by other living thing. 3.) The cell is the most basic unit of life. B.) Contributors to the Cell Theory: People | Information | Hooke | He was the first to identify cells and he also named them. | Leeuwenhoek | He made better lenses so he observed cells in greater detail. | Schledien | He was the first to note that plants are made of cells. | Schwann | He concluded that all living
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BIO 353 Cell Biology Study Questions for Exam #3 Fall‚ 2012 Cytoskeleton “The harder the conflict‚ the more glorious the triumph.” Thomas Paine... “Unless you really just screw up.” Bush 1. What are microfilaments? (He said know how to identify/draw these) Note: since it is multiple choice‚ I doubt we will have to know how to draw them. **There are also short essay questions and‚ in past classes‚ he has asked students to draw. I thought the final was ALL MULTIPLE CHOICE???********************************
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the use of cell phones? According to scientific evidence cell phones may actually be more harmful than you think. I believe cell phones are dangerous to our health because they have been linked to causing tumors‚ can affect your eye health‚ and they also hold a lot of bacteria. Cell phones have more serious risks than they do benefits. Therefore it is better to limit how much you use your cell phone. It has been scientifically proven that you can actually get a tumor from the use of cell phones. These
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Chapter 6: A Tour of the Cell Cell fractionation – cells are taken apart using a centrifuge (differential centrifugation) and separated into their sub cellular structures Point of Difference | Eukaryotic | Prokaryotic | Shape/Size | Larger | Smaller | Complexity | Membrane bounded organelles | No membrane bound organelles | Nucleus | Bounded membrane with DNA | DNA in a region (nucleoid) | Kingdom | Plants‚ animals‚ fungi‚ protists | Bacteria and archaea | Reproduction | Sexual reproduction
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2. Draw and completely label a cell membrane. [pic] 4. List and briefly discuss the 5 components of cellular membranes. 1. Phospholipids layer- 2 layers ‚ polar and non polar ‚ polar facing the extracellular fluid and cytoplasm 2. Transmembrane proteins-integral membrane proteins are proteins that expand the membrane 3. Interior protein network-peripheral proteins are in the interior side of the membrane 4. Cell surface markers are glycolipids‚ carbohydrates/lipid
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oxidized and thus causes reduction ELECTROCHEMISTRY INVOLVES TWO MAIN TYPES OF PROCESSES: A. Galvanic (voltaic) cells – which are spontaneous chemical reactions (battery) B. Electrolytic cells – which are non-spontaneous and require external e− source (DC power source) C. BOTH of these fit into the category entitled Electrochemical cells GALVANIC CELLS Parts of the voltaic or galvanic cell: o Anode--the electrode where oxidation occurs. After a period of time‚ the anode may appear to become smaller
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increases in complexity? A) ecosystem‚ population‚ organ system‚ cell‚ community‚ molecule‚ organ‚ organism‚ tissue B) cell‚ molecule‚ organ system‚ organ‚ population‚ tissue‚ organism‚ ecosystem‚ community C) organism‚ organ system‚ tissue‚ population‚ organ‚ community‚ cell‚ ecosystem‚ molecule D) molecule‚ cell‚ tissue‚ organ‚ organ system‚ organism‚ population‚ community‚ ecosystem E) ecosystem‚ molecule‚ cell‚ tissue‚ organism‚ organ system‚ organ‚ community Answer: D Topic:
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light microscope when you want to see the cell in the act of moving or dividing. 2. Prokaryotic cells don’t have organelles like eukaryotic cells do. Eukaryotic cells contain its DNA within its nucleus‚ while prokaryotic cells keep it within the nucleoid. Prokaryotic cells are also more minute than the eukaryotic cells. Also although they both contain ribosomes‚ they are composed differently. 3. The central vacuole (takes in water and chemicals)‚ cell wall (allows the plant to be strong enough
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Cell City Cell City A cell is like a city. They both have parts that play different roles. A cell is microscopic that has organelles‚ and a city has different services. Keeping them both running smoothly and orderly. As a result they both survive and grow. There’re a lot of different organelles in a cell that are similar to a city for example the cell membrane borders and protects the cell it’s role is letting certain things in and out of the cell in the same way a border in a city does. Another
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21 October 2013 Cell phones Should we allow students to use their cell phones in school? Would it be benifical for students? Students should have the abilty to use their cell phones in school because you will never know what will happen to you or your child. There can be any type of an emergency such as earthquakes‚ a crime scene‚ or a fire. Students should be able to use cell phones in school because how about if someone was going to get hurt and didnt have a way to get help or find help
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