... concept behind was not a new concept in the early 1900s, but had never been given a name before. Even early societies put into practice. For instance, in ancient Sparta, sickly children were killed or abandoned.1 They filtered out the “undesirable� traits in children, a practice which has come to be called “negative .�2 In the late nineteenth century, a man named Francis Galton gave eugenic thought great emphasis.3 Yet it was not until Gregor Mendel’s theories on genetics were rediscovered by Charles Davenport in 1901 that the ideas of modern was given any credibility.4 Davenport conducted expe ...

... micro flora that is on and in the body, and part three will describe the structure and replication procedure of viruses. Part one As stated by Prescott, Harley and Klein (1990) microbiology is the study of organisms that are usually too small to be seen with the naked eye. According to Jenson and Wright (1989) a pathogen is a disease-producing organism. They also describe microbes as organisms that are often too small to be seen without the aid of a microscope. Microbes, also known as microorganisms, can be broken down into four classifications that are bacteria, viruses, fungi, and protozoa. Presco ...

... of an effective vaccine is hampered by the elusive nature of the bacterium. was first recognized in 1975 after researchers investigated why unusually large numbers of children were being diagnosed with juvenile rheumatoid arthritis in Lyme and two neighboring towns. The investigators discovered that most of the affected children lived near wooded areas likely to harbor ticks. They also found that the children's first symptoms typically started in the summer months coinciding with the height of the tick season. Several of the patients interviewed reported having a skin rash just before developing their arthriti ...

... areas surrounding :  Two different terms to describe .  Characteristics of someone with .  The learning process.  Three areas that are affected by the disability.  Focusing and behavior.  Misconceptions about dyslexia.  Seeking help through organizations. What exactly is dyslexia? “The word dyslexia is derived from the Greek “dysâ€� meaning poor or inadequate and “lexisâ€� meaning language. Dyslexia is a learning disability characterized by problems in expressive or receptive, oral or written languageâ€�(Wilkins URL). Simply put, dyslexia means troub ...

... Any change in forest habitat creates “winners” and “losers.” As forests go through natural cycles of growth, death and regeneration, species may inhabit or be absent from a given area partly in response to natural changes in the structure of trees and other forest vegetation(4). The same occurs when forest stands are managed by humans. Unless future credible research indicates otherwise, effort should be made to manage a wide range of forest structures. Maintaining diversity would be best served by using a broader range of management tools. Those would include harvesting on f ...

... deicer because it is the most available and cost-effective deicer. Rock salt is preferred because it is cheap and effective. It costs 20 dollars a ton where as an alternative like calcium magnesium cost around 700 dollars a ton. Some 10 million tons of deicing salt is used each year in the U.S. and about 3 million in Canada. Salt is used to keep snow and ice from bonding to the pavement and to allow snowplows to remove. When salt is applied to ice and snow it creates a brine that has a lower freezing temperature than the surrounding ice or snow. Salt is the ideal deicing material because it is: •the le ...

... due to the need to be highly selective with materials that enter the cell's nucleus. The cell itself is surrounded by a membrane. In between the membrane of the nucleus and the cell membrane is cytoplasm. It is in the cytoplasm where all of the other organelles are stored. There are six main organelles in the cytoplasm. First, the mitochondria, which provides energy to the cell through ATP and respiration. Then there is the endoplasmic reticulum which separates parts of the cell. Then there is the Golgi apparatus which is used for sorting, storing, and secretion for the cell. Next are lysosomes, which hydrol ...

... bears are carnivores and there isn’t a lot of food in the Arctic, they must be able to travel a great distance at a good speed. Looking at a polar bear you will probably notice that it is bowlegged. This means that their huge paws point inward. Having their paws in this position helps them grip the slippery ice. Another specialized feature of its paws is that they have pads of dense fur on the bottoms. Polar bears are the only bears that have this feature. These pads help the bear retain heat and to grip the ice and provide better traction. Polar bears are fast movers. When on uneven ice the bear will ...

... the more serious, and potentially deadly conditions known to medicine: the ectopic pregnancy. Ectopic pregnancies are the number one cause of death of women in the first trimester of pregnancy. There are many aspects that have to taken care of when an ectopic pregnancy is identified. Not only are there the symptoms, the diagnosis, the treatments, and the results to deal with, but also moral ethics come into play. The term “ectopic� literally means “out of place�. Other things in the human body can also be considered ectopic if it sits in an abnormal position in the body. A heart beat that originates from a ...

... plane instruments, with in-flight accessibility, provided by investigators selected from the international science community. The Observatory objective is to have an operational lifetime in excess of 20 years. The SOFIA project is in the early full-scale stage. The start of detailed system design is anticipated in the Fall of 1996. The German Space Agency (DARA) is a partner with NASA in the SOFIA project. DARA will provide the telescope and NASA will provide the rest of the facility including the 747 aircraft, aircraft modifications, on-board mission control system, ground facilities and support equipment, over ...