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Free Daphnia Essays and Papers

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    Essay On Daphnia

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    What is the “water flea?” The most scientific name for this little water flea is called the Daphnia, a very small planktonic crustacean that measures up to five millimeters long. Daphnia are part of the Cladocera family, which are small crustaceans of all sorts commonly called water fleas. The Daphnia are called water fleas because the movements they make are very similar to the way fleas move around. Daphnias “inhabit most types of standing fresh water except for extreme habitats, such as hot springs

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    An Investigation to Show the Effect of Temperature on Daphnia Plan: I will submerge some daphnia contained in a test tube in water of differing temperatures and measure their subsequent heart rates. Hypothesis I think that the heart rate of the daphnia will increase up until around 40ËšC at which point most of the daphnia's enzymes will have denatured and rate of metabolism will have stopped or decreased sufficiently to have stopped the daphnia's heart rate. Apparatus list Test

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    concentrations of ethanol on the heart rate of Daphnia Magna. This experiment was performed on May 20th, 2014 in a closed environment at the University of Toronto. The test subjects Daphnia Magna, were collected from the Cell and Systems Biology Daphnia Colony, in which they were maintained at room temperature. The Daphnia sp are relatively common model organisms that are inexpensive, easy to care for, transparent, and also survive well in culture. In addition, the Daphnia Sp are able to quickly adapt physiologically

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    Ibuprofen

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    Ibuprofen Abstract The project that I chose to research was the effect of Ibuprofen on the heart rate of the daphnia. The reason that I chose to do this was because many people in society use over the counter pain killers without really understanding any of the long term effects of this medicine other than clearing their aches pains, and swelling. One of the leading drugs on the market today is Ibuprofen which you may know as Motrin or Advil. Both drugs are identical except for quantity and price

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    Daphnia Essay

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    Investigating the effect of caffeine concentration on the heart rate of Daphnia Introduction Daphnia, commonly known as water fleas, are tiny crustaceans which live in water. The diameter of adult female bodies is approximately 3-5 mm. The upper skeleton is transparent, making the internal organs visible. This allows the heart rate of the Daphnia to be calculated by observing them under a microscope. Background Caffeine occurs naturally in some plants such as coffee beans and tea leaves. Caffeine

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    Daphnia Lab Report

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    genus Daphnia to chemical stimuli and to examine human responses to different stimuli. A stimulus is an incentive; it is the cause of a physical response. Stimuli can have a physical or chemical change; an example of a physical change is a change in temperature and sound. An example of chemical change would be changes in hormone levels and pH levels. Muscular activity or glandular secretions are responses that occurs when stimulus information effects the nervous and/or hormone system. Daphnia is a

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    Case Study Of Daphnia

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    Introduction Daphnia are a common freshwater zooplankton, they are a member of the crustacean family. Daphnia are ectothermic animals which means their core body temperature fluctuates depending on the temperature of their environment. Temperature has a powerful effect on the biological processes of ectothermic animals. Acute changes to water temperature can have major impacts upon genetic growth and development as well as physiological and metabolic processes. Changes in temperature that remove

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    Daphnia Case Study

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    Effect of Caffeine on Heart Rate of Daphnia Problem Statement How the Effect of Various Coffee Bean Roasts on the Heart Rate and Longevity of Daphnia Magna. Background Information on Coffee Caffeine is a compound found in mostly tea leaves, coffee beans, soft drinks, and some prescriptions. caffeine has a bitter taste to it. It is a white crystalline xanthine alkaloid. It’s from a family called heterocyclic compounds, and it is from a member of methylxanthines. Xanthines are purine that are

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    Daphnia Research Paper

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    Daphnia or daphnids are commonly called water fleas because of their jerky or jumping swimming style. Daphnia is a genus of small, aquatic (mostly freshwater), generally between .2 and 5 mm in length, and characterized by a single compound eye, two double branched antennae, and generally have a translucent exterior. Daphnia is planktonic crustaceans that belong to the class of Branchiopoda, which are characterized by flattened leaf-like legs used to produce a water current for the filtering apparatus

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    eggs/offspring sizes in either treatment. According to, (McKee, 1997) maternal daphnia of the same population had low variability in intra-clutch offspring size and that the maternal body length does not relate to the size of the offspring. This would suggest that there is an ability to control fluctuating sizes of the offspring in relation to the genotype of the maternal population (McKee, 1997). Since all the daphnia from this experiment were clones from the same female, this could mean that the

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