"Flatworms roundworms and rotifers" Essays and Research Papers

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    COMMON AILMENTS/DEFECTS OF SCHOOL CHILDREN DENTAL CARIES * Dental caries is an infectious‚ communicable disease‚ which causes destruction of teeth by acid-forming bacteria found in dental plaque. * Early childhood caries (ECC) is a “virulent” form of dental caries that can destroy the teeth of preschool children and toddlers. Early childhood caries can also be defined as the occurrence of any sign of dental caries on any tooth surface during the first 3 years of a child’s life. Economically

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    Biology Exam

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    1. The classification system developed by Linnaeus in the early 1700s divided living organisms into plant and animal kingdoms. Today‚ that has been expanded into five kingdoms. Which of the following inventions was most responsible for creating the need for the additional three kingdoms and why? (2 points) (0 pts) Fossil fuel-based transportation made it easier to explore and discover new species. (0 pts) Genetic engineering created new species which then needed new kingdoms. (2 pts) Microscopes

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    Vertebrate Zoology Study Guide I. Taxonomy 1. Reasons for Taxonomy a. means of providing a systematic framework with which to work when studying the varied life forms inhabiting this earth b. establishes order from chaos c. Provides a system of nomenclature with which you label items (organisms) d. necessary when imagining trying to gather information on an unfamiliar organism e. Meant to provide a useful‚ convenient system using all evolutionary‚ adaptational‚ and anatomical aspects

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    soil of the world’s tropical and subtropical countries( World Health Organization‚ 2005). As adult worms‚ these worms live for years in the human gastrointestinal tract. Most Infections are caused by four main species of worms commonly known as roundworms( Ascaris lumbricoides)‚ whipworms( Trichuris trichiura) and hookworms( Ancylostoma duodenale and Necator americanus. Infections are associated with poverty and underdevelopment particularly among people living in rural or deprived urban settingswith

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    Annelids: Ringed Worms

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    the Pogonophora‚ Echiura and Sipuncula‚ previously regarded as separate phyla‚ are now regarded as sub-groups of polychaetes. Annelids are considered members of the Lophotrochozoa‚ a "super-phylum" of protostomes that also includes molluscs‚ brachiopods‚flatworms and nemerteans. The basic annelid form consists of multiple segments‚ each of which has the same sets of organs and‚ in most polychaetes‚ a pair of parapodia that many species use for locomotion. Septa separate the segments of many species‚ but

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    CHAPTER -I INTRODUCTION Seafood refers to any sea animal or plant that is served as food and eaten by humans. Seafoods include seawater animals‚ such as fish and shellfish (including molluscs and crustaceans). By extension‚ in North America although not generally in the United Kingdom‚ the term seafood is also applied to similar animals from fresh water and all edible aquatic animals are collectively referred to as seafood‚ however in some countries such as New Zealand they are categorized as

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    Brent Ian Luis NASC5 Z-3R Mrs. Faith Maranan Odessa Tumbali The Interactions and Interrelationships among the Different Components of the Ecosystem I. Introduction Ecology is the study of environmental systems‚ or as it is sometimes called‚ the economy of nature (Hall and Weiss‚ 2010). It studies interactions between different organisms and their environments‚ including relations within its own species and members of others. Ecology focuses more on the population

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    Aseptic Technique 2

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    however can cause damage or even bring about death to other organisms and these are the microbes that humans have battled to control over many years with varying degrees of success. (Toole & Toole‚ 1995) Microscopic parasites such as Nematodes (roundworms) are diverse. Treatments for such infestations target inhibition of growth or reproduction. If an area needs to be treated to prevent the infection of another organism disinfectants may be used. They work by inhibiting the growth or destroying

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    livestock animals. The tissues of livestock animals contain high level of omega 6 fatty acid but livestock lack the enzymes (n-3 fatty acid de-saturase) to convert omega 6 fatty acids to omega 3 fatty acids. The fat-1 gene desaturase found in the roundworm C. elegans convert omega 6 fatty acids to omega 3 fatty acids by introducing double bond into the gene (Saeki et al.‚ 2004). Phytase transgenic pigs have been developed to address the problem

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    Semantics

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    SEMANTICS -The study of semantics includes the study of how meaning is constructed‚ interpreted‚ clarified‚ obscured‚ illustrated‚ simplified‚ negotiated‚ contradicted and paraphrased. AREAS OF SEMANTIC THEORY * Semantic fields * Metaphor * Homonymy * Homophony * Homographs * Polysemy * Hyponymy * Hypernymy * Antonymy * Synonymy A. SEMANTIC FIELD * Set of lexemes which cover a certain conceptual domain and which bear certain specifiable relations

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