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Free research essays on topics related to: bacteria

217 results found, view free essays on page:

  • Petri Dishes Bacteria Cells
    1,566 words
    In this lab we observed the growth of bacteria in a conjugation and transformation experiment. We expected the mating plate of the conjunction to grow and the bacteria on the transformation plates to grow also. We also practiced using aseptic techniques to clean the lab benches and to keep the bacteria from being contaminated from outside bacteria. This lab will take a total of 2 days because of the observations that need to be made. The parts of this paper will explain the procedure and the obs...
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  • Bacteria Cells Harsh Conditions
    1,391 words
    As hard as it is to believe, bacteria (also known to scientists as Bacillus, thuringiensis) are everywhere; on your hands, on door handles, theres even thousands bacteria on the period at the end of this sentence (Thats how small they are). Bacteria have been around for about 3. 5 billion years. They were the first life forms on earth and more numerous then any other species we know of. Yet, while they are extremely common, they are also very small. Bacteria can only be seen with microscopes and...
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  • Gram Negative Petri Dishes
    1,384 words
    Abstract/Summary: Changing our focus from the properties and functions that take place within the cell to the actual cell itself, we observed three specific bacterial types within this lab: Gram-positive bacteria, Gram-negative bacteria, and cyanobacteria. We closely observed the features of cyanobacteria and were able to differentiate them from other bacteria. We specifically observed gloeocapsa, merismopedia, anabaena, and oscillator. In addition to this we observed the different characteristi...
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  • Country To Country Animals And Plants
    1,533 words
    Bacteria's are one-celled organisms that were discovered in 1676 by Anthony Van Leeuwenhoek. Many people like to define bacteria as a germ, but in reality germs are a form of bacteria. Most bacteria are not harmful to ones body but helpful in ways no one expects. (List 6) For example bacteria located in soil that is used to grow food by turning dead animals and plants into the rich, dark topsoil. (Leitz 7) They also make shelter for humans and animals. Bacteria are removed from ones teeth and bo...
    Free research essays on topics related to: animals and plants, antibiotic resistance, international travel, nov 2000, country to country
  • White Blood Cells Cell Wall
    1,297 words
    Bacteria is a simple organism that consists of one cell. They are among the smallest living thing on earth. Most bacteria measures from about 0. 3 to 2. 0 microns in diameter, and can only be seen through a microscope. Scientist classify bacteria according to shape. Cocci are round and sometimes linked together. Bacilli look like rods, and Vibrios resembles bent rods. There are two types of spiral-shaped bacteria, spirochetes and spirilla. Bacteria exist almost anywhere you can think of. There a...
    Free research essays on topics related to: cell wall, bacteria, white blood cells, cell membrane, human beings
  • Running Head Microbiology 100 Module 2
    869 words
    Running head: MICROBIOLOGY 100 MODULE 2 Microbiology 100 Module 2 July 18, 2009 Microbiology 100 Module 2 Characteristics of Bacteria Bacteria are very small, microscopic organisms whose single cells have neither membrane-bounded organelles nor membrane-bounded nucleus. Bacteria are unicellular microorganisms, usually few micrometers in lengths (Croddy, 2004). These microorganisms vary in shapes, as they may range from spirals to rods and spheres. Basically, bacteria are found everywhere on the ...
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  • Gram Positive And Negative Bacteria
    828 words
    Gram Positive and Gram Negative Bacteria It is a well-known fact that bacterial cells, like plant cells, are surrounded by a cell wall. However, few people know that their cell walls are quite different. Bacterial cell walls are made up of polysaccharide chains linked to amino acids. At the same time, plant cell walls are made up of cellulose, which contains no amino acids. In the same way, bacterial cell walls themselves differ from one another. Scientists distinguish two types of bacteria cell...
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  • Gulf Of Mexico Hydrothermal Vents
    1,247 words
    Colleen Cavanaugh Dr. Cavanaugh is a Professor of Biology in the Department of Organismic and Evolutionary Biology at Harvard University. Cavanaugh's research focuses on the ecology and evolution of bacteria, with special emphasis on symbiotic bacteria, which is associated with marine invertebrates that inhabit deep-sea hydrothermal vents and shallow reducing sediments. Cavanaugh's studies showed the major macro fauna at hydrothermal vents studied to date host symbiotic, chemosynthetic bacteria....
    Free research essays on topics related to: bacteria, gulf of mexico, ribosomal rna, energy source, hydrothermal vents
  • Genetically Engineered Restriction Enzymes
    2,958 words
    Genetic Engineering Discuss the applications and techniques involved in genetic engineering. Consider the advantages and disadvantages of this approach. Genetic engineering is an umbrella term that can cover a wide range of ways of changing the genetic material the DNA code in a living organism. This code contains all the information, stored in a long chain chemical molecule, which determines the nature of the organism. Apart from identical twins, genetic make-up is unique to each individual. In...
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  • Petri Dishes Flowering Plants
    3,855 words
    Is there an effect on Rhizobium bacteria by changing its pH? Steve Lincoln Period 3 12 / 7 / 98 Question What are the effects of varying pH levels on Rhizobium bacteria, and can a pH resistant Rhizobium culture be grown? Hypothesis Alterations of the balanced habitat such as the change of pH levels can drastically alter the life of bacteria and can directly affect chemical reactions of enzymes released by the bacteria. Using this information the change in pH will have an effect on the Rhizobium ...
    Free research essays on topics related to: flowering plants, ph levels, sulfuric acid, hydrochloric acid, petri dishes
  • Somatic Cell Therapy Germ Line Therapy
    3,341 words
    Genetic engineering has been one of the most controversial ethical issues since 1997; when Dolly the first successfully cloned sheep was announced. Dolly has redefined the meaning of? identical twin? ; not only does she look exactly like her mother she also has the same genetic make up. This experiment was not only impossible but unthinkable. Yet, Dr. Ian Wilmut revealed Dolly on February 23, 1997, at seven months old (Travis 1). On the surface genetic engineering may appear to be the solution t...
    Free research essays on topics related to: evolution of man, germ line therapy, mutations in nature, genetic engineering, somatic cell therapy
  • Somatic Cell Therapy Germ Line Therapy
    2,940 words
    Genetic Engineering: A leap in to the future or a leap towards destruction Introduction Science is a creature that continues to evolve at a much higher rate than the beings that gave it birth. The transformation time from tree-shrew, to ape, to human far exceeds the time from an analytical engine, to a calculator, to a computer. However, science, in the past, has always remained distant. It has allowed for advances in production, transportation, and even entertainment, but never in history has s...
    Free research essays on topics related to: mutations in nature, millions of years, somatic cell therapy, germ line therapy, evolution of man
  • Somatic Cell Therapy Germ Line Therapy
    2,334 words
    Genetic Engineering: A leap in to the future or a leap Towards destruction? Science is a creature that continues to evolve at a much higher rate than the beings that gave it birth. The transformation time from tree shrew, to ape, to human far exceeds the time from an analytical engine, to a calculator, to a computer. However, science, in the past, has always remained distant. It has allowed for advances in production, transportation, and even entertainment, but never in history has science be ab...
    Free research essays on topics related to: somatic cell therapy, restriction enzymes, germ line therapy, dna strand, genetic engineering
  • Earths Magnetic Magnetic Field
    1,384 words
    INTRODUCTION: The magnetic south and north poles of the earth create magnetic field lines in which these bacteria travel. These bacteria were found to contain iron, which is comparable to ferromagnet's or magnetite produced synthetically. This iron is found to line up to the magnetic field lines similar to how a compass works. Many of the principles of magnetism can be explained by observing these bacteria. NARRATIVE: The physical principles behind magnetic bacteria rely on the earths magnetic f...
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  • Play An Important Role Nucleic Acid
    4,677 words
    Abstract/Keywords: Bacterial&# 65279; NatureS Smallest Syringe: &# 65279; Abstract/Keywords: Bacterial viruses play an important role in the development of molecular biology. Thousands of different phages have been isolated and almost every one is uniquely suited to the investigation of a different biochemical or genetic event. With the experiments of dHerelle, Twort and the Phage group, the understanding of phages processes have grown throughout this century. Because of the many differences exi...
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  • Degrees Celsius P Amp
    815 words
    Title: Colony Transformation Lab Purpose: To study the behavior of Escherichia coli once it has been introduced to a foreign gene. Hypothesis: If the ampicillin resistant DNA is introduced into the E. coli bacteria, through the uptake of this DNA the bacteria will receive the resistant gene that will permit the bacteria to grow freely in the presence of ampicillin. Experimental Design: By observing the E. coli bacteria one can study how it reacts when a foreign gene such as the ampicillin resist...
    Free research essays on topics related to: e coli, degrees celsius, bacteria, x 10, p amp
  • Heavy Metals Metal Ions
    2,146 words
    The inhibitory effects of a mercury compound, silver nitrate, and copper sulfate on Bacillus cereus, Escherichia coli, Micrococcus lotus, and Pseudomonas putin Introduction Certain heavy metals can have harmful or inhibitory effects on microorganisms, a process known as oligo dynamic action; for example, some heavy metal ions accumulate in cellular proteins leading to protein denaturation and ultimately cell death (Biology 108 lab manual 2001). A consequence of this is that heavy metals can affe...
    Free research essays on topics related to: heavy metals, metal ions, heavy, lab manual, gram negative

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