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Free research essays on topics related to: aquatic

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  • Body Hair Human Evolution
    1,701 words
    Human Evolution: the water theory. Elaine Morgan The crucial question about human evolution is why humans differ so strikingly from the African apes despite their close genetic relationship. Most Darwinists would agree that such differences are usually attributable to differing environmental pressures; and hence that our ancestors at some stage probably occupied a significantly different habitat from the ancestor of the gorilla and the chimpanzee. For the last half-century it has been generally ...
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  • Invasion Of Molesta Kariba Weed
    1,104 words
    ... the traditional transplanted method to direct seeding method was taking place particularly at Must rice granary area. The increased usage of fertilizers resulted in the leaching of a certain amount of nutrients into the aquatic ecosystems. A fertilizer that is generally rich in phosphate and nitrate plays an important role in triggering the tremendous growth of floating weeds (Caffrey et. al 1996). A noticeable feature of rice fields that depend heavily on the use of fertilizer is the occurr...
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  • Body Of Water Websters Dictionary
    723 words
    Water Pollution People keep on throwing trash and industrial wastes into our clean water. If this continues, the quality of our water will deteriorate, and without it everything dies, including us. Water pollution is destroying our world, but fortunately we can count on special treatments for this kind of problem. What is water pollution? "It is the contamination of water by foreign matter such as organisms, chemicals, and industrial or other wastes" (Encarta 96). Water has six major pollutants....
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  • Road Salt And The Environment
    1,465 words
    As awareness for pollution increases, other less noticed types of pollution are recognized. Almost everyone knows about toxic waste and carbon dioxide pollution, but not many people have heard of salt pollution. Salt pollution has been on the increase since the evolution of the automobile. With more pressure on government agencies to keep the highway clear and safe, an increase in the use of salt has developed. It is important to understand why salt is used and how it work as well as the environ...
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  • Organic Molecules Organic Matter
    633 words
    Dissolved oxygen infers to the volume of oxygen that is contained in water. Oxygen enters water through photosynthesis and across the water interface. The amount of oxygen that can be held by the water depends on the water pressure, salinity, and temperature. Gas solubility increases with decreasing temperature; thus colder water holds more oxygen. A reason why freshwater holds more oxygen than does saltwater is because gas solubility increases with decreasing salinity. When there is a change in...
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  • Choose One One Side
    576 words
    Choose your pond liner size. Once you have your preferred liner size, you want to find the perfect spot to place it. (Make sure it is not near any trees because leaves will fall in to the pond and the roots of the trees will tare the liner. ) Now measure out the size that you want your pond to be (note-the size of the pond will be determined by the size of your liner). You also have to choose your shape you want your pond to be. To keep the size and shape right, use wooden stakes and string to o...
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  • Coastal Plains North Carolina
    860 words
    The coastal plains of North Carolina is characterized by flat land, wide rivers, beautiful and diverse ecology and rich agricultural soils, however many environmental pollutants are defiling this fragile ecosystem. There are several factors that are associated with the destruction of the coastal plains ecosystem, but there is one factor that stands out more than all the others. The major source of pollution that is threatening eastern North Carolina's ecosystems is industrial swine farming. Swin...
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  • Federal Government Chesapeake Bay
    873 words
    All around America, there are many examples of Federalism involving environmental protection and preservation. Often, states will take care of small situations or those that are situated in their state only. However sometimes, issues get too big or too important to be resolved by the state governments alone, so the federal government involves themselves. Because of our current political system, the federal government is dominant over the states rule. Things like Everglades revitalization, Chesap...
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  • Types Of Society Morgan Explains Chapter
    1,035 words
    ... as a touch of arousal. The male and female being close to each other with comforting touches often lead to mutual arousal. This act of the comfort moves these actions towards love. The only difference between them [the man and woman] was that he would get his behavioral reward even if the emotion was absent, while for hertha without this embellishment the whole performance seemed singularly pointless and unsatisfying (110). We are different from many other apes but our one strong difference ...
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  • Chemical Form Mercury Chemical Form Mercury May Travel Fish
    699 words
    Introduction Mercury is a silvery, liquid metal at room temperature. It is sometimes referred to as one of the "heavy metals. " Like water, mercury can evaporate and become airborne. Because it is an element, mercury does not break down into less toxic substances. Once mercury escapes to the environment, it circulates in and out of the atmosphere until it ends up in the bottoms of lakes and oceans. Depending on its chemical form, mercury may travel long distances before it falls to earth with pr...
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  • ' Zimmer P Snake Lost Its Legs Snakes
    588 words
    How the Snake Lost Its Legs In the article 'How the Snake Lost Its Legs, ' Carl Zimmer wrote about the common theory of snake evolution is about to be questioned. All vertebrates that live on land whether mammalian or reptilian are known as tetrapods. In most animals these feet evolved into other limbs, like arms for humans and into wings for birds; however, the snake lost its four feet altogether. The only sign that snakes ever had four feet is a remaining hip located within the rib cage. Paleo...
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  • Million Years Ago Long Period Of Time
    1,219 words
    From Water to Land (Revision) Abstract: The early tetrapods were the first vertebrates to actually walk the solid earth. They began their conquest of land in the Paleozoic era around 360 million years ago. The question many paleontologists have been asking for a long period of time is whether the anatomy for locomotion on land was developed in water for swimming purposes, or if it was adapted after the creatures became terrestrial. Recent findings of fossils indicate that the transformations of ...
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  • H 2 O Feelings And Emotions
    1,802 words
    River Why Literary Analysis Symbolism is widely used by authors especially in fiction. The movement is opposite to Naturalism and Realism. Symbolism is based on spirituality, the imagination, and dreams. Its aim is to capture more absolute truths but the methods used are indirect; thats why authors that are considered to belong to the movement wrote in a highly metaphorical and suggestive manner, giving particular images or objects with symbolic meaning. Symbolism is hostile to plain, matter-of-...
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  • Dry Land Million Years
    726 words
    Life in standstill is impossible. Life was changing in the seas and developed on the shallow waters. But the conditions of dry land are much more changeable. Water environment is rather monotonous. Mountains and lowlands, swamps and deserts change their places with a dizzy (by evolutionary measures) speed on the dry land. It is impossible for a land life form to accommodate to some specific conditions hoping that flexibility will allow accommodating to new ones. These life forms had to have the ...
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  • Vertical Hanging Scroll Painting Vertical Hanging Scroll Kind
    1,094 words
    Chinese Painting Genres Painting Featuring Taoist, Monk and Supernatural This kind of painting described the figure of Taoist, Buddhist, ghost or supernatural in legend. Painting Featuring Aquatic Animals This kind of painting described the figure of aquatic animals, such as dragon or insect, etc. Male This kind of painting described the figure of man. It was corresponded with Painting Court Lady. Painting Featuring Birds and Animals This kind of painting described the figure of bird. Court Lady...
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  • Western United States Effects Of Acid Rain
    399 words
    Effects of Acid Rain on Water The effects of acid rain are most clearly seen in the aquatic, or water, environments, such as streams, lakes, and marshes. Acid rain flows to streams, lakes, and marshes after falling on forests, fields, buildings, and roads. Acid rain also falls directly on aquatic habitats. Most lakes and streams have a pH between 6 and 8. However, some lakes are naturally acidic even without the effects of acid rain. Lakes and streams become acidic (pH value goes down) when the ...
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  • Hellbender Cryptobranchus Alleganiensis Alleganiensis Cryptobranchus Alleganiensis Alleganiensis Hillis
    584 words
    (Cryptobranchus Hellbender The Eastern Hellbender (Cryptobranchus alleganiensis alleganiensis) Cryptobranchus alleganiensis alleganiensis is the largest North American salamander, ranging in length from 30. 5 to 74 cm (Niering 1985). Eastern Hellbenders are members of the order of tailed amphibians, Caudata and the family, Cryptobranchidae. Along with C. a. bishop, the Ozark Hellbender, it is one of the two subspecies of hellbenders, also known as the Allegheny alligator or devil-dog. C. a. alle...
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  • Long Term Effects Short Term Effects
    886 words
    During recent years, the public has become increasingly aware of the hazards of oil spills. Photographs and vivid descriptions of oil-soaked birds floundering on oil covered shores have become routine coverage by the news and media. Oil spillage has become an increasing problem with the advent of offshore drilling and the transport of petroleum in large tankers. The extent and effects of oil pollution are of great concern to the world today. A recent study estimated that the amount of oil spille...
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  • Reduce The Amount Raw Sewage
    1,578 words
    Pollution in Ocean Environments The ocean is a fragile ecosystem that must have a element of constancy to ensure that life can continue. The plants and the animals alike depend on the ocean and it is being destroyed by toxins from human activities. Pesticides like DDT are lethal to the animals in the ocean if given in large enough amounts and in some areas there is enough DDT to do just that. Sewage left untreated or improperly treated has the same effect as DDT. The chemicals that come out of t...
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  • Scuba Diving Basic Principles
    909 words
    This Essay will illustrate some of the basic aspects of scuba diving. It will show the steps involved in assembling the scuba gear. The price range of scuba gear. The basic principles of diving, and were to go to get certified in scuba diving. It will also reveal some fun things that can be done while diving. The assembly of the scuba gear is very simple. First have your tank filled to the recommended amount of pressure (usually 3000 psi). Take the tank with the valve handle to the right, and se...
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