... traveling one to two thousand miles inland. This long journey is now often interrupted by hydroelectric plants. Hydropower is a very good alternative resource for power, however it is very damaging to our salmon populations. The dams block off rivers, which block the salmon's path back to their breeding grounds. The salmon go back to the same areas, just as their ancestors did, to lay their eggs. The hydropower plant's turbines are also very dangerous to young salmon. Many of them are killed by the giant turbines on their way back to the ocean. Killing off many of the salmons new generation. Pollution is al ...

... This theory, for a short time, was able to end the feud among educated men because many now put their trust in this new “theory of evolution�. Unfortunately, this revolutionary new theory threatened the religious beliefs about creation and soon a new rivalry emerged between the creationists and evolutionists. According to Charles Darwin man began as one of a few species on this new planet striving for survival. However, man was better equipped with certain traits that allowed him to pass through the filter of natural selection. Man was supplied with both physical and intellectual traits that were respons ...

... is referred to as eutrophication. Each of these pollutants pose a different effect on the ecosystem at different doses. This varied effect is what is referred to as dose and duration. The amount of the pollutant administered over what period of time greatly affects the impact that the pollutant will have on an ecosystem and population. Pollutants can affect both a population and an ecosystem. A pollutant on a population level can be either non-target or target. Target effects are those that can kill off the entire population. Non-target effects are those that effects a significant number of individuals and spre ...

... the day started out just like any other day. People of Roswell were going off to work, going downtown shopping, and the little ones were at playgrounds with their mothers. Day in and day out townspeople would drive by the military without giving it much thought. However, this day, in Roswell, New Mexico would change the course of history, and how the public thinks of themselves, God and the outer limits of space! Roswell New Mexico was in the middle of the desert. Here was a vast open land where one could see miles around. On this afternoon something very strange was about to happen. In the clear skies ...

... a muscle protein known as dystrophin. At about 2,500,000 nucleotides, dystrophin is one of the largest genes known. Dystrophin is largely responsible for reinforcing and stabilizing the sarcolemma. Dystrophin associates with the muscle fiber sarcolemma by interacting with the actin microfilaments and with a transmembrane protein complex linked to the extracellular matrix. This latter dystrophin-associated glycoprotein complex (DAGC) includes the extracellular proteoglycan, [Alpha]-dystroglycan, which binds to merosin in muscle fiber basal laminae, as well as a number of other integral and cytoplasmic membrane ...

... MRI (Magnetic Resonance Imaging) scans of people with autism show abnormalities in the structure of the brain. Significant abnormalities include differences in the cerebellum and in the size and number of Purkinje cells within the brain. Sometimes there is a pattern that exists within families from generation to generation. This indicates the possibility that autism is genetically related. However, no gene has been found. Every person with autism is different and there is no set type or typical person with autism. This is because autism is a spectrum disorder, meaning that symptoms and characteristics of the d ...

... lakes in North CCarolina are impaired for swimming and 6% are impaired for aquatic life uses. A few lakes are impacted by dioxin, metals, and excessive nutrient enrichment. The Champion Paper mill on the Pigeon River is the source of dioxin contamination in Waterville Lake. The State and the mill implemented a dioxin minimization program in the mid-1980s and completed a modernization program in 1993 that will reduce water usage and discharges. About 94% of the estuaries and sounds in North Carolina fgully support designated uses. Agriculture, urban runoff, septic tanks, and point source discharges are the leading ...

... as a management tool has a fascinating history, especially in the United States Forest Service, but the ecological effects of prescribing a fixed burning regime on large tracts of land are increasingly being questioned (Lyons, 1985, 3). To an ecologist, fire can be treated as just one of the many factors in an environment. It compares with droughts, floods, hurricanes and other physical disturbances because of the direct impact it makes on organisms. Unlike these physical factors, however, fire as a disturbing force is itself influenced by the biota, particularly the plant community. Alteration of the vegetati ...

... of the global economy, the success of firms today and in the future depends on their ability to operate globally. The American economy depends on imports and exports. Foreign trade, both imports and exports accounts for a little over 25 percent of goods and services produced in the United States, and even more in countries like Japan and Germany. This percentage is currently and will continue to grow in the future (5). Globalization of the world’s industrial economies greatly enhances the value of information to the firm and offers new opportunities to businesses. Today, information systems provide the com ...

... horses chest. This new invention prevented horses from being strangled, which allowed for faster plowing and greater food production. Around the same time as the chest harness’ invention, medieval villagers were organizing their land into a two field system of agriculture. This system utilized one large field divided in half, one half of a field with crops and left the other half of a field was left unplanted for a year so as not to exhaust the soil. This system led to problems, because dividing the land in half led to shortages in the production of food because only half of the field was being used. This system ...