... should not be allowed to cut down the old- growth of the forest. The old growth of a forest includes the largest and oldest trees, living or dead. In the case of the North Coast forests, this includes some thousand-year-old stands with heights above three-hundred feet and diameters of more than ten feet. In 1990, the number of spotted owls dropped to 2000 breeding pairs. The preservation of any species contributes to the biodiversity of an area. In an ecosystem, the absence of one species creates unfavorable conditions for the others. The absence of the spotted owl could have a significant effect on the North Coast forest ecosystem. In order to send the ow ...
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... by using these differences to determine the transit time of the solutes through a column. Simple liquid consists of a column with a fritted bottom that holds a stationary phase in equilibrium with a solvent. Typical stationary phases (and their interactions with solutes) are: solids (adsorption), ionic groups on a resin (ion-exchange), liquids on an inert solid support (partitioning), and porous inert particles (size exclusion). The mixture to be separated is loaded onto the top of the column followed by more solvent. The different components in the sample mixture pass through the column at different rates due to differences in their partition behavior between th ...
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... through the sides of randomly- oriented ice crystals. As the sunlight passes through each crystal, the light changes direction, or refracts. The radius of the hale depends on the amount of change in the direction of the sun's light. Usually this is 22 degrees. Since the sun is 1/2 of a degree across, the radius of the halo is 44 sun-widths. Occasionally you may see a second halo at 46 degrees from the sun (that is, with a radius of 92 sun-widths). This is produced by sunlight passing through both the side and bottom of each crystal. Moonlight will also produce a halo, around the moon, with the proper layer of cirrostatus. Another common optical effect is ...
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... have them. This process would also let single women have a child without using in-vitro fertilisation or artificial insemination. Cloning could also make a copy of a deceased child for the parents. Also it would be a very useful tool for historians as people such as Hitler would be able to be recreated and studied to find out what their motivations were. Besides from all these good points cloning also has bad points. The biggest problem with cloning on a large scale is the lack of genetic diversity. If everyone has the same genetic material, what happens if we lose the ability to clone? We would have to resort to natural reproduction, causing us to inbreed, ...
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... guard would. The prisoners were treated like normal criminals. They were finger printed and booked, after that they were told to put on prison uniforms and then they were thrown into the slammer (in this case a simulated cellblock in the basement was used). All of the participants in this experiment at first were thought to be similar in behavior but after one week, all of that changed. The prisoners became "passive, dependent, and helpless." The guards on the other hand were the exact opposite. They became "aggressive and abusive within the prison, insulting and bullying the prisoners." After the experiment was finished, many of the mock guards said th ...
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... MTBE enhances the octane in gasoline and decreases carbon monoxide emission by increasing burning efficiencies. In its haste to declare MTBE as a required ingredient in gasoline, the EPA failed to consider a basic chemical property of MTBE and its long-term effects upon the environment. Because MTBE is highly water-soluble, it dissolves in water, leading to higher concentrations of MTBE in many lakes in the California Sierra Nevada mountains and in many groundwater supplies. Hence, by addressing only one component of a system separately, the EPA failed to see the ramifications of our apparent solution. This myopic approach to environmental remediation commonly sub ...
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... Herrick was the first person to publish a medical report on . As the report accumulated, a patter emerged. In 1926, Dr. Thomas P. Cooley and Dr. P. Lee described two forms of sickle cell disease: and sickle cell trait. During 1945, Dr. Linus Pauling discovered that an abnormal form of hemoglobin was the reason for the sickness in sickle cell patients. These two took a train together and started talking about . Castle told Pauling about how the cells in sickle cell patients sickled when their oxygen level is low. Paling was amazed by this conversation and did further research on the disease. After that Pauling was able to tell which patient had sickle cell ...
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... this stage a store of ATP is also built up. [Best put a labelled diagram of a cell during Interphase here.] Prophase --------------------------------------- In this second stage changes to the cell become visible. The chromosomes condense, coiling up to about 5% of their original length, now clearly visible when a stain is added. The centrioles move to the opposite poles of the cell and small microtubules around the centrioles become visible (called "Asters"). The nuclear membranes and nucleolus disintegrate after passing their nucleic acids to certain pairs of chromatids. Now a spindle forms, this is also made out of microtubules. [A labelled diagram of th ...
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... begin suddenly, with a sharp, sever pain in the chest which may radiate to the left arm and shoulder. Other symptoms may include restlessness and confusion; the skin may be cold and clammy, dyspnea, cyanosis, a drop in blood pressure, and a drop in body temperature. A rapid and irregular pulse may also be a sign of a resent MI. In the beginning of the twentieth century, bedrest was the only thing that could be done for heart attacks. Then nitroglycerin was found to restore coronary circulation and relieve the pain. Digitalis was found effective for treating abnormal heart rhythms and diuretics were found effective to remove water, which reduced hypertension. Wit ...
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... This process is called embryo screening it is used to determine if the child has received the defective gene. Several embryos could be cloned, then the DNA from one of the embryos would then be removed and standard genetic testing would be used to detect whether or not that embryo contained the genetic disease. If this cloned embryo containd a disease then one of the other embryos could be used for implantation in a parent, this guarantees that the child would be free of genetic disease (Marshall 1025). For those who disagree with cloning I am sure if there child could be saved from a genetic disease they would reconsider cloning. Imagine if one of your friends ...
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