Osmosis The purpose of this lab is to study how membranes of plant and animal cells react when exposed to different solutions. The first experiment involves purple onion skin and the second involves rat blood in various solutions. I needed to understand certain terms before preforming this lab to be able to efficiently explain what is happening to the cells. Diffusion is the tendency of a substance to move down its concentration gradient from a more concentrated to a less concentrated area.
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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 is examined as a major difference between the two; therefore‚ under the microscope both cells appear much unique from one another
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MBK – Lab Report Name: ____ Section: ___ Module 1‚ Experiment 1: Observing Bacteria and Blood (No microscope needed for this lab) Questions: A. List the following parts of the microscope‚ AND Briefly describe the function of each part. A. Eyepiece – transmits and magnifies the image from the objective lens to the eye. B. Main tube – moves vertically for focusing C. Nosepiece– holds the objective lenses and rotates them. D. Objective lens - Objective lenses provide
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Visually examine the culture. A dissecting (or stereo-) microscope may be useful for this purpose. Record: a. colour or pigmentation of the culture b. texture (powdery‚ viscous‚ etc.) 3. Obtain a clean microscope slide and add 1-2 drops of lactophenol cotton blue (stain) to it. 4. Obtain a short piece of cellophane tape. Be careful to touch it only at the two ends.
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Calcium‚ Magnesium‚ and Cytoplasmic Streaming in Physarum Polycephalum Eugenia Rita Lee Dr. Bonner BIO 111 Introduction: Physarum polycephalum is a type of slime mold of the myxogastria class that prefers warm and damp conditions. It can go through three forms‚ plasmodium‚ sclerotium‚ and sporangia. The plasmodium is the primary active state‚ where P. polycephalum consists of protoplasmic veins and multiple nuclei. During this stage‚ the slime mold surrounds its’ food and secretes enzymes
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1. Why are spindle fibers important for mitosis? (5 points) Spindle fibers work as a path for chromosomes to travel(Campbell‚ 2009). 2. State the four bases that make up DNA. (4 points) a. (A)-Adenine b. (G)-Guanine c. (T)-Thymine d. (C)-Cytosine (Campbell‚ 2009). 3. What are the two base pairs? (2 points) a. AG b. CT 4. Answer the following questions: a. Define the term crossing over. (3 points) The phase in meiosis where chromosomes exchange segments of genetic materials (Campbell‚ 2009). b. Explain
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Introduction The fabrication techniques nowadays have many limitation‚ open up the new opportunity for scientists to build device that required less time for fabrication‚ higher performance and low power consumption. The advantage of the use of molecules is that they can be synthesized with almost unlimited variations‚ this allows for the development of many electronic devices. Many theoretical molecular configurations have been demonstrated as rectifiers‚ memories or transistors‚ in reality it is
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the existence of ether‚ baffling physicists everywhere until Einstein’s postulation. ! ! Another commonly used application of the Michelson Interferometer is in imaging cells. In this application‚ the Michelson Interferometer is mated to a microscope and the cell is in one arm of the interferometer. When light passes through the cell‚ it undergoes a phase shift which depends on the cell thickness and organelles within the cell. The fringe pattern produced can be used to construct a three
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Windy T. Padilla BIO 008 OP 1-1 Dr. Elmo Ado Laboratory Instruments: Test Tube -A test tube‚ also known as a culture tube or sample tube‚ is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing‚ open at the top‚ usually with a rounded U-shaped bottom. Test Tube Rack - A test tube rack is a gadget used in the laboratory for holding test tubes. It is made of a base that has a platform which is mounted
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