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Essays on Science

Monarch Butterflies Coevolution With Milkweed
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... Butterfly weed plant. First the monarch lays its egg on the leaf of the plant. Once the Caterpillar is born it eats the leaf for nutrition. The Monarch caterpillar is striped black and yellow. As it grows and becomes ready to become a chrysalis by forming a cocoon it uses the plant again. The caterpillar forms its cocoon on the Butterfly Weed. By the time the caterpillar is ready to become a chrysalis it has grown to be about 45 millimeters in length. The chrysalis is pale green and spotted with gold. It becomes more transparent as the butterfly gets ready to break free. The adult Monarch has a wingspan of about 4 inches. The male and female can be told apart by a ...



Cloning 4
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... or viruses arising from successive replications of a single ancestral unicellular organism or virus. 2. a recombinant clone. 3. the fragment of foreign DNA contained in each member of a recombinant clone. 4. a population of identical cells arising from the culture of a single cell of a certain type, such as a human fibroblast or a rodent-human hybrid cell containing a full set of rodent chromosomes and a single human chromosome. Human embryo cloning starts with a standard in vitro fertilization procedure. Sperm and an egg cell are mixed together on a glass dish. After conception, the zygote (fertilized egg) is allowed to develop into a blastula (a hollow mass o ...



ADHD ON INTELLIGENCE
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... In turn these children develop a low-self esteem and low levels of motivation (Morgan, 1997). The etiology of ADHD is still a mystery to researchers. Within the field there are many correlates to biological (genetic) and social causes. The present paper seeks to explore current research through investigating the social and bio-genetic influence of ADHD on child intelligence. Testing and treatments of those with ADHD will also be discussed. In accordance with Dulcan et al. (1997) ADD, ADD-H, ADHD, although not identical, will be considered interchangeably due to similarity. Characteristics and Testing of ADHD Intelligence Even though ADHD occurs in people ...



Cloning: Background
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... a sheep. This event marked the first time a mammal had been cloned in this way ("Clone"). The scientist who started cloning is Ian Wilmut (who led the group) (Recer). He cloned Dolly using the nucleus from the cell of its mother, and it had an exact genetic replica of its mother. This spurred arguments about cloning humans (Recer). After Wilmut hinted he may be repeating his experiment to silence the critics (Recer). Wilmut does not have the courage to repeat his experiment, also that the government will never allow him to repeate it. Another reason for cloning is that before it was done and even now scientists think cloning could help produce genetic models of ...



Skylab
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... around the other panel keeping it from deploying. Skylab was maneuvered so its Apollo Telescope Mount (ATM) solar panels faced the Sun to provide as much electricity as possible. Because of the loss of the meteoroid shield, however, this positioning caused workshop temperatures to rise to 126 degrees F. The launch of Skylab 2 was postponed 10 days while NASA engineers developed procedures and trained the crew to make the workshop habitable. At the same time, engineers "rolled" Skylab to lower the temperature of the workshop. Skylab's 2nd manned mission - May 25th to June 22nd Astronauts; Charles Conrad, Jr. Paul J. Weitz Joseph P. ...



Circus Animals
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... is not always readily available in all locations, leaving many animals with out water. Furthermore, with out water, cleaning becomes a low priority. This is very hard on animals especially elephants who bathe frequently in their natural environment. But, the circus environment is very different from an animal’s natural habitats. Summer can be hard on animals such as bears, while lions, can suffer more in winter months. Veterinarians qualified to treat exotic animals, are not always present or available. As a result animals suffer and die due to the lack of proper medical attention. Physical confinement is very harmful physiologically and psychologically. ...



Limonene And Its Uses
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... any regulatory controls that are needed to effectively manage each pesticide's risks. EPA then reregisters pesticides that can be used without posing unreasonable risks to human health or the environment. When a pesticide is eligible for reregistration, EPA announces this and explains why in a Reregistration Eligibility Decision (RED) document. This fact sheet summarizes the information in the RED document for reregistration case 3083, limonene. Use Profile Limonene is a naturally occurring chemical which is used in many food products, soaps and perfumes for its lemon-like flavor and odor. Limonene also is a registered active ingredient in 15 ...



Human Cloning Isn't As Scary As It Sounds
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... of the sort familiar from science fiction. It would be more like producing a delayed identical twin. And just as identical twins are two separate people—biologically, psychologically, morally and legally, though not genetically—so a clone is a separate person from his or her non-contemporaneous twin. To think otherwise is to embrace a belief in genetic determinism—the view that genes determine everything about us, and that environmental factors or the random events in human development are utterly insignificant. The overwhelming consensus among geneticists is that genetic determinism is false. As geneticists have come to understand the ways in which genes operate ...



Hepatitis B
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... Transmission is probably prevented by correct use of condoms. Health care workers and patients receiving hemodialysis are also at increased risk of infection. Effective vaccines are available for the prevention of HBV infection. All individuals at risk for infection should be vaccinated. Post-exposure prophylaxis with immune globulin is also effective for non-immune individuals after a known exposure (e. g. needle stick). Consequences of HBV Infection HBV causes acute and chronic hepatitis. The chances of becoming chronically infected depends upon age. About 90% of infected neonates and 50% of infected young children will become chronically infected. In contr ...



Feeding Yeast
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... through this experiment I hope to use to increase my comprehension of baking techniques. Experimentation For the actual experiment, I used four (4) ICB root beer bottles, 4 balloons, yeast and the yeast foods- corn syrup, flour/water, gelatin, and grape juice. The yeast was a solution-6ľ teaspoons of yeast per cup of very warm (105° to 115°) water. Into all four bottles I put four tablespoons (tbsp.) of the yeast solution. Put ˝ cup of corn syrup into bottle one, along with the yeast solution. Into bottle two goes ˝ cup of water and ˝ cup of flour, and the yeast solution. Next, mix the gelatin according to directions on the package, about one-table ...




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