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4,466 Essays on Science. Documents 1,471 - 1,500

  • Evaluating the Risk of Malathion

    Evaluating the Risk of Malathion

    Evaluating the Risk of Malathion The city of Genericville is the home to many species and has become a tourist attraction because of the beauty in the natural circle of life that can be experienced here. Unfortunately, the growing problem with mosquitoes and the spread of the West Nile Virus threatens the livelihood of Genericville’s citizens, and the survival of the wildlife here. A proposal to eradicate the problem is the application of an insecticide

    Essay Length: 331 Words / 2 Pages
    Submitted: January 14, 2010 By: Jack
  • Evaluation of Hicrome Coliform Agar for the Detection and Enumeration Total Coliform and E.Coli from Poultry Feed and Water Samples

    Evaluation of Hicrome Coliform Agar for the Detection and Enumeration Total Coliform and E.Coli from Poultry Feed and Water Samples

    EVALUATION OF HICROME COLIFORM AGAR FOR THE DETECTION AND ENUMERATION TOTAL COLIFORM AND E.coli FROM POULTRY FEED AND WATER SAMPLES Thulasi Rajkumar, Sharon MacDonald, R. Kannan, R. Suresh Kumar and CN.Ramchand Customer Laboratory Services Kemin Nutritional Technologies (I) Pvt. Ltd., No: 39, The Trapezium, Second Floor, Nelson Manickam Road, Chennai-600 029 Tamil Nadu, INDIA ABSTRACT The purpose of this study was to examine the use of Hicrome Coliform Agar medium for isolation and enumeration of

    Essay Length: 638 Words / 3 Pages
    Submitted: December 4, 2009 By: Kevin
  • Evidence Based Practice

    Evidence Based Practice

    Student Number: C1560272Module Code: NR3122 SCHOOL OF HEALTHCARE SCIENCES Assessment Front Sheet This sheet must be used as the first page of all work submitted Student ID number: C1560272 Module code: NR3122 Module name: Evidence-Based Nursing Practice. Declared word count: 3495 words Summative work must be submitted via Learning Central by 4pm on the due date Students are required to keep a copy of all work submitted ________________________________________________________________ I confirm that the material contained

    Essay Length: 5,120 Words / 21 Pages
    Submitted: May 19, 2017 By: aysha.alshibli
  • Evidence of Evolution

    Evidence of Evolution

    Basilosaurids and dorudontids lived in the late Eocene, approximately 35 and 41 million years ago. They are mainly known from the eastern United States and from Egypt, but were probably worldwide in their distribution. Basilosaurids were enormous (possibly up to 60 feet long) and had snake-like bodies. They had a tailfluke, but it is not clear whether that was the main propulsive organ. Dorudontids were proportionally more like dolphins. Both basilosaurids and dorudontids had complete

    Essay Length: 1,540 Words / 7 Pages
    Submitted: March 13, 2010 By: Fonta
  • Evolution


    The first exhibit that was viewed upon entering the museum was the dino zone. There, I observed several dinosaurs, but the most noted dinosaur was the Tyrannosaurus Res (T. Rex). The T. Rex that I observed in detail was Sue. Sue was auctioned and bought by the museum. Most notably, Sue’s skull is over 5 and a half feet tall. If one were to study the size of the forearm, her forearms are relatively short

    Essay Length: 1,439 Words / 6 Pages
    Submitted: November 9, 2009 By: Fonta
  • Evolution


    Theistic Evolution is one of three major origin-of-life views, the other two being Atheistic Evolution, commonly known as Darwinian Evolution, and Special Creation. Atheistic Evolution says that there is no God and that life can and did emerge naturally from preexisting non-living building blocks under the influence of natural laws. Special Creation says that God created life, either from scratch or from preexisting materials. Theistic Evolution says one of two things: That, while there is

    Essay Length: 602 Words / 3 Pages
    Submitted: November 16, 2009 By: Andrew
  • Evolution


    The majority of people in this world believe that a spiritual being created earth. In fact, "most religions and cultures believe the universe was created by a 'creative hand,' either a sky god or some other physical object" (Encarta 1). Think of it, as a trial to see which will win, creation or evolution. It has been the most argued debate in all of history, but creationism is more logical than evolution. To first understand

    Essay Length: 917 Words / 4 Pages
    Submitted: December 22, 2009 By: Anna
  • Evolution


    Evolution Evolution, a process of change through time, is what links together the enormous diversity of the living world. A lot of evidence is present that indicates that the earth has had a very long history and that all living things arose in the course of that history from earlier, more simpler forms. In other words, all species have descended from other species and all living things share common ancestors in the past. Basically, organisms

    Essay Length: 2,685 Words / 11 Pages
    Submitted: December 29, 2009 By: Edward
  • Evolution


    Charles Darwin had two great themes in "On the Origin of Species" which accounted for the similarities and adaptations characteristic of living organisms. To account for the adaptations of organisms and those innumerable features that equip them for survival and reproduction, Darwin (and Wallace) independently came up with the central theory of evolutionary process: natural selection. Natural selection gives insight in to why organisms are the way that they are. Adaptations are phenotypic variants that

    Essay Length: 1,581 Words / 7 Pages
    Submitted: January 7, 2010 By: regina
  • Evolution


    Since the 19th century, biologists have questioned the origin of life, asking the question “How did life first begin?” To answer that question, they have come up with two contradicting yet plausible theories, Creation and Evolution. The theory of Creation states that an intelligent being designed each organism. On the other hand, the theory of Evolution states that some form of stimuli sparked one of the earliest forms of life and that every single organism

    Essay Length: 1,908 Words / 8 Pages
    Submitted: January 14, 2010 By: Fonta
  • Evolution


    The definition of evolution is change over time. It has been agreed upon by the vast majority of the world that evolution happens and species are not immutable, unchanged. Theories have been experimented with, but the one accepted by scientists is Darwin’s theory of natural selection. Darwin’s trip aboard the Beagle brought about one of the most important scientific realizations of all time. He realized that on the Galapagos Islands there were different types of

    Essay Length: 1,245 Words / 5 Pages
    Submitted: February 23, 2010 By: Kevin
  • Evolution


    Evolutionary ideas such as common descent and the transmutation of species have existed since at least the 6th century BCE, when they were expounded by the Greek philosopher Anaximander. Such views rose to prominence in the 18th century, but the first convincing exposition of a mechanism by which evolutionary change could occur was not proposed until 1858, when Charles Darwin and Alfred Russel Wallace jointly presented the theory of evolution by natural selection to the

    Essay Length: 2,099 Words / 9 Pages
    Submitted: May 7, 2010 By: Victor
  • Evolution and Its Discontents

    Evolution and Its Discontents

    Evolution and Its Discontents Charles Darwin's theory of evolution completely undermined the idea that we are designed for a purpose. His claim that we are all products of evolution questioned the traditional Western conceptions of our nature by suggesting that we are not made in God's image, but rather are the result of a natural evolutionary process that makes us a more developed version of the cognitive powers of nonhuman primates. Although there is no

    Essay Length: 672 Words / 3 Pages
    Submitted: December 19, 2009 By: Mike
  • Evolution of Birds

    Evolution of Birds

    Evolution of Birds It has become widely accepted that birds have evolved from reptiles in the Jurassic period and are the living descendants of a group of dinosaurs called theropods. Birds share hundreds of unique skeletal features with dinosaurs. Over the years, birds have evolved in a wide variety of forms, from flightless and aquatic to flying animals. Due to poor fossil records, some information regarding the evolution of birds are based on theories but

    Essay Length: 470 Words / 2 Pages
    Submitted: January 9, 2010 By: Yan
  • Evolution of Man

    Evolution of Man

    Scientists continue to debate the history of man. It is generally agreed upon by the scientific community, however, that humans evolved from lesser beings, and this essay will function to provide evidence to support this claim. Several points will be outlined, including the general physical changes that occurred between several key species on the phylogeny of man, and a discussion of dating methods used to pinpoint the age of the fossils. This essay will

    Essay Length: 3,066 Words / 13 Pages
    Submitted: March 22, 2010 By: Bred
  • Evolution of Modern Humans

    Evolution of Modern Humans

    There are two main theories regarding the origin of modern humans. The first theory suggests that pre modern humans evolved into modern humans prior to leaving Africa and then dispersed in different directions; this theory is called the “Out of Africa Theory”. The second theory suggests that pre modern humans left Africa and dispersed in different directions and evolved into modern humans, this is called the “multi regional theory”. I personally believe in the “out

    Essay Length: 843 Words / 4 Pages
    Submitted: February 19, 2010 By: regina
  • Evolution of Plants - Biology 2002

    Evolution of Plants - Biology 2002

    Emms, Simon K. "Evolution of Plants." Biology. 2002. Retrieved October 30, 2014 from classification systems, based largely on molecular evidence, divide living organisms into three domains: Bacteria (also called Eubacteria), Archaea, and Eukarya. Plants are classified as a kingdom (Plantae) within the Eukarya; organisms that possess a nucleus, mitochondria, an internal cytoskeleton, and, in photosynthetic species, chloroplasts. Most scientists recognize three other eukaryotic kingdoms: Protista (most of which are single-celled organisms), Fungi, and

    Essay Length: 267 Words / 2 Pages
    Submitted: October 30, 2014 By: Keith Howes
  • Evolution V. Creation

    Evolution V. Creation

    Evolution Should the stork theory appear in books on reproduction? How about astrological lore in expositions on astronomy? It would be unreasonable to even consider those ridiculous concepts. This is why the idea of creation should not be considered as the answer to how life began. Rather, the theory of evolution accounts for the creation of life. Charles Darwin is credited with creating the theory of evolution. Evolution assumes that all natural forms arose

    Essay Length: 1,859 Words / 8 Pages
    Submitted: March 13, 2010 By: Mike
  • Evolution Vs. Creationism

    Evolution Vs. Creationism

    People are always arguing over which theory is true, evolution or creationism. The theory of evolution has a lot to do with natural selection. Natural selection is when the individual with the best traits survives, and passes on their good traits to their offspring. Those offspring create more individuals with those strong traits, and eventually all of the species will have those strong traits. This means that if this cycle is carried on long enough,

    Essay Length: 759 Words / 4 Pages
    Submitted: December 5, 2009 By: Jessica
  • Evolution Vs. Creationism: Disproving the Theory of Evolution

    Evolution Vs. Creationism: Disproving the Theory of Evolution

    Evolution vs. Creationism: Disproving The Theory of Evolution Since the 19th century, biologists have questioned the origin of life, asking the question “How did life first begin?” To answer that question, they have come up with two contradicting yet plausible theories, Creation and Evolution. The theory of Creation states that an intelligent being designed each organism. On the other hand, the theory of Evolution states that some form of stimuli sparked one of the earliest

    Essay Length: 1,894 Words / 8 Pages
    Submitted: January 14, 2010 By: David
  • Ewrfer


    Willy's believed that all it takes to become successful is being well liked. Willy thought that Oliver would let Biff borrow some money even though if Bill Oliver hasn't seen Biff around ten years. " You know why he remembered you, don't you? Because you impressed him in those days." (pg.108) Biff stole Oliver's basketball and it been a long time that Oliver didn't see or contact with Biff, so there is no way

    Essay Length: 505 Words / 3 Pages
    Submitted: April 21, 2011 By: milzy2233
  • Exciton Energy of Cds Quantum Dots

    Exciton Energy of Cds Quantum Dots

    Studying the quantum size e ects on the exciton energy of two-dimensional CdS quantum dots in the single band e ective mass approximation for both electron and hole, we use a nite con nement in the x{y plane and we assume also that the induced charge is spread along a very thin interface in the z-direction. Solving the SchrЁodinger equation with a new numerical method, which is called potential morphing method, we obtain the corresponding energy within

    Essay Length: 2,810 Words / 12 Pages
    Submitted: January 2, 2010 By: Bred
  • Exercise and Aging - a Qualitative Correlation

    Exercise and Aging - a Qualitative Correlation

    EXERCISE AND AGING: A Qualitative Correlation In 1523 the Spanish explorer and conquistador Ponce de Leon went searching for the legendary Fountain of Youth. What he discovered was Florida; not quite the quick-fix of a magical substance flowing from a fountain but a nice place for frozen northeastern residents to go for recreation in the winter. The idea of mythical youth is still very much alive in our culture and most noticeable in the advertising

    Essay Length: 2,929 Words / 12 Pages
    Submitted: November 17, 2009 By: Mike
  • Exercise and Obesity

    Exercise and Obesity

    Introduction There is a growing understanding of how certain levels of physical activity may positively affect cardiovascular, musculosketetal, respiratory and endocrine function, as well as mental health (Kravitz, 2007). The Surgeon General's report (1996) on physical activity and health emphasizes that regular participation in moderate physical activity is an essential component of a healthy lifestyle. Several studies (Haapanen et al, 1996, Lee et al, 1994) have shown that physical activity enhances health and reduces the

    Essay Length: 1,809 Words / 8 Pages
    Submitted: November 10, 2009 By: Yan
  • Existence of Yetis

    Existence of Yetis

    Existence of Yetis The existence of yetis, also known as sasquatches, is really unknown. Stories of yeti confrontations vary beyond reason. Most of these stories are found in Native American legends (Stonehill 1). Theories are so outrageous that doubt flourishes. A yeti is a large bear or gorilla like mammal that is mainly found in the Himalayas. It is a biped which means that it walks on its two hind feet, upright. From a distance,

    Essay Length: 1,178 Words / 5 Pages
    Submitted: January 14, 2010 By: Fatih
  • Experiment 12: Avogadro's Number

    Experiment 12: Avogadro's Number

    CHEMISTRY I Experiment 12: Avogadro’s number (hand out) Introduction: The objective of this experiment is to determine the value of Avogadro’s number and the mole concept via the use of the monolayer experiment. Experimental data sheet: Attached Calculations: 1. Area of monolayer A= 3.14(8.58 cm)І / 4 A= 231 cmІ / 4 A = 57.8 cmІ 2. Molecules of stearic acid in monolayer 57.8 cmІ x 1molecule = 2.8 x 1016 molecules 2.1 x

    Essay Length: 599 Words / 3 Pages
    Submitted: April 8, 2010 By: Victor
  • Experiment 17

    Experiment 17

    Experiment 17 Polymers By Kaiyi Hall 3/7/16 Dr. Liskin Background Polymers are macromolecules built from smaller molecular subunits, called monomers. Synthetic polymers can be classified into two main types according to the mechanism by which they synthetically grow from monomer to polymer: chain-growth polymers and step-growth polymers. This classification scheme is an update from historical nomenclature, in which polymers were classified by whether there existed a byproduct of the polymerization reaction (condensation polymerization) or not

    Essay Length: 701 Words / 3 Pages
    Submitted: March 21, 2016 By: Kaiyi H
  • Experimental and Numerical Studies of Foam-"lled Sections

    Experimental and Numerical Studies of Foam-"lled Sections

    * Corresponding author. Tel.:#1-617-253-2104; fax: #1-617-253-1962. E-mail address: (T. Wierzbicki) International Journal of Impact Engineering 24 (2000) 509}534 Experimental and numerical studies of foam-"lled sections Sigit P. Santosa!, Tomasz Wierzbicki!,*, Arve G. Hanssen", Magnus Langseth" !Impact & Crashworthiness Laboratory, Massachusetts Institute of Technology, Room 5-218, 77 Massachusetts Avenue, Cambridge, MA-02139, USA "Department of Structural Engineering, The Norwegian University of Science and Technology, N-7034, Trondheim, Norway Received 30 September 1998; received in revised form 29

    Essay Length: 2,709 Words / 11 Pages
    Submitted: January 25, 2010 By: regina
  • Experimental Design Project

    Experimental Design Project

    Since the early 1990’s, people have been complaining about the reception they get on their cellular phones. Several products have been on the market, but few actually work. This experiment is to disprove one of these products, which is known as a Cellular Reception Booster Sticker. This product started to show up on the market in early to mid 2001. Supposedly this product works as a passive antenna which will draw more signals into the

    Essay Length: 285 Words / 2 Pages
    Submitted: November 16, 2009 By: July
  • Experimental Mealworm Lab

    Experimental Mealworm Lab

    Question and Problem Statement I am trying to learn about things that I didn’t know about before. I am discovering a whole new type of life and explore all the things I didn’t think existed before this class. I thought that this was really important that we did different experiments so we could see the reaction on them and study the cause and effect of each one. Literature Search A mealworm at that stage can

    Essay Length: 325 Words / 2 Pages
    Submitted: January 2, 2010 By: Janna
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