that the weight decreases. In our second experiment‚ we use three slices of aquatic plant Elodea and add pond water one leaf‚ distilled water for the second and 20% NaCl for the third‚ then observe the cells of each leaf with a compound microscope. Under microscope‚ chloroplasts (green organelles) in Elodea tend to bound to the cell wall in pond water‚ spread all over the cell in distilled water‚ pull away from cell wall in 20% NaCl. In our last experiment‚ we use a dialysis bag that contains 30%
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gametes. This process is important for generating diversity in life and aiding in evolution. Materials and Methods The materials used in the lab were two agar petri plates‚ a permanent marker‚ labeling tape‚ sterile scalpel‚ compound microscope‚ toothpick‚ microscope slide‚ water‚ cover slip‚ and the ascospore Sordaria cultures‚ which included wildtype (dark)‚ tan‚ and grey (mutant) fungi. First‚ collect two agar plates to make the cross between the three different colored ascospores. The Sordaria
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B.Sc. First Year Semester – I Paper I .Fundamentals of Microbiology Credit - 1 1 Scope & relevance of Microbiology i) ii) iii) Definition & concepts Types of microorganism Distribution of microorganisms in nature 2. Development of Microbiology as a Scientific Discipline 1.1 History i) ii) iii) iv) v) vi) Credit – 2 Early observation of microorganisms Spontaneous generation conflict : Contribution of scientists Recognition of the microbial role in diseases. Koch’s postulates Recognition of microbial
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Abstract Stomata is important to plants because of their role in gas exchange and photosynthesis. Clear nail polish and clear plastic tape were used to make leaf impressions of A. floridanum. Once impressions were completed‚ compound microscopes were used to count the total number of stomata per slide. The counts of stomata were used to find stomatal densities‚ along with the open/closed ratios of stomata. Stomatal density and open/close ratio of stomata did not differ between the two locations
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separate when seen by microscope. Mounting press was use to mount the specimen to make it suitable for handling at the time of grinding and polishing. Different kind of sand paper was used to grind and make smooth the spacmens and finally polishing cloth with diamond suspension was used to remove the extra scrachs . to diffrantiate the grain boundaries it was etched by nital solution. Finally the first observation was taken made by optical microscope and scanning electron microscope.
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Biology 12 - The Cell Part A: In ONE sentence‚ in the space provided‚ describe the function of the following organelles. Use point form. Use your own words. Paraphrase and condense the textbook definitions. DO NOT copy any definition or part of a definition. In the box to the left of each definition‚ make a sketch of the organelle. |SEE NOTES |1. cell membrane: control what goes in and out of cell‚ forms barrier with outside environment |
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Effect of Chemicals on Daphnia Heart Rate Background: In the world today‚ there are many chemicals that people use to fix or help with issues within their own bodies. Some of these chemicals may include things like caffeine‚ nicotine‚ and alcohol. These supplements can have substantial effects on other things within the body like the brain‚ liver‚ and especially the heart. For example‚ many chemicals like caffeine‚ nicotine‚ aspirin‚ and sleep aid all have effects on the body which can cause your
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SENSE OF SIGHT…. The eyes are sensory organs. They keep the brain updated with information about is what happening around the body. Both contain millions of tiny sensors that send messages along nerves to the brain. Sensors in the eyes respond to light and‚ through the brain‚ let us see the world. Sensors in the skin respond to touch and allows us to feel. * * * * The seeing eye… Light enters the eye through the clear cornea. It then passes through the
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classified as Class 1 by US Public Health Service/Biosafety Level 2 Review everything about the microscope and our original laboratory EXERCISE 1: USE AND CARE OF MICROSCOPE: (Covered 9.4.14 II Week 1) THE MICROSCOPE: Simple microscope early microscope; like a magnifying glass Brightfield compound microscope Most often used Base Bottom of microscope Stage Holds slide Arm Carries the microscope Body Tube Transmits the magnified image Condenser Lenses that concentrate light by focusing it
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Session #1 Lab 1 OBSERVING BACTERIA AND BLOOD D Haynes BIO-218A Microbiology Lab Friday‚ January 17‚ 5:00pm Objective(s): Our objective is to gain knowledge of the functions and operations of the microscope through observation of bacteria and blood slides that are available for this assignment. We are also learning to “see” and observe various bacteria and their shapes as well as live yogurt cultures‚ blood‚ plaque and cheek swab samples and their arrangements. We
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