.... a fertile soil base. Soil type is an important factor for which species of trees can thrive in an area. The general dominant tree species for temperate deciduous forests are Beech, Ash, Oak, and in our region also Tulip, Maple, Birch, and Hickory. Developed forests consist of four layers. The layers are: canopy, sub canopy, shrub, and ground cover. This layering affect benefits the diversity of the ecosystem by providing a rich variety of habitats. It is a result of adaptation and competition for sunlight and shows the continuing process of succession. The stratification of a forest, by intercepting the some of the availabl .....

.... due to rainfall or irrigation, can result in a dramatic rise in groundwater pressure and watertable levels. The trees of the open forests are now replaced by shallow-rooted crops and pastures which absorb far less water than the native trees. Those trees had been massive water pumps, sucking up moisture from deep underground and putting it back into the atmosphere through the evaporation from their leaves. With those pumps gone, excess rainfall accumulates underground and watertables rise to the surface, bringing ancient sediments of salt with them, often in heavy concentrations. Once exposed to the air and sun, the salts beco .....

.... numbers in the Australian waters. The great white is a very agile killer that hunts mostly anything in the ocean. They are carnivorous and usually prey on sick or injured prey. Just one drop of blood can make the shark go into a feeding frenzy. It is not made to swim fast and its usual speed is fifteen miles per hour. It migrates south to warmer waters to give birth to six to nine pups. The only way it can defend itself is by using its mouth and its razor-sharp teeth. One of the most largest specimens caught was off of Mantauk, Long Island, and New York, in 1964; it was seventeen and a half feet lo .....

.... technical miracle can be lifted. The first step to understanding genetic engineering, and embracing its possibilities for society, is to obtain a rough knowledge base of its history and method. The basis for altering the evolutionary process is dependant on the understanding of how individuals pass on characteristics to their offspring. Genetics achieved its first foothold on the secrets of nature's evolutionary process when an Austrian monk named Gregor Mendel developed the first "laws of heredity." Using these laws, scientists studied the characteristics of organisms for most of the next one hundred years following Men .....

.... once extended as far south as Colorado, Indiana, Pennsylvania, and perhaps Michigan. It looks like a weasel maybe because it is in the weasel family.It has black and brown fur and long claws.It’s legs are short but strong. The Wolverine is usually solitary except for members of the opposite sex and a female's young. After the females give birth they hide with their young. The mother defends her territory and intruders are not tolerated. This territorial behavior continues until the young are ready to hunt on their own. The Wolverine has a diet that can include anything from small eggs to full-sized deer. The Wolverine is ca .....

.... to the extreme. People sent him plants from all over the world, and he would devise a way to relate them. At the age of thirty-two he was the author of fourteen botanical works. His two most famous were Genera Plantarum, developing an artificial sexual system, and Species Plantarum, a famous work where he named and classified every plant known to him, and for the first time gave each plant a binomial. This binomial system was a vast improvement over some of the old descriptive names for plants used formerly. Before Linnaeus, Catnip was known as: "Nepeta floribus interrupte spicatis pedunculatis" which is a brief description of .....

.... is an intriguing substance in the way that the moment you change the percentage of one of its components, the itself is different. (Education Dep. Properties: Chemical). Often, it can even be classified as a different type of . Commercial es are found in six basic categories, soda-lime , lead , borosilicate , aluminum silicate , ninety-six percent and fused silica . Soda-lime is the most common and least expensive . Approximately ninety percent of all is soda-lime . Soda-lime contains between sixty and seventy-five percent silica, twelve to eighteen percent soda and five to twelve percent lime. Its resistence to high temp .....

.... Picoides borealis nest in clans or family groups that usually consist of one breeding pair and 2 non-breeding male helpers (Jackson, 1986 ). This group establishes and defends a territory that includes foraging habitat and nesting "cavity trees" (Copeyon et al., 1991; Jackson et al., 1986; Rossell and Gorsira, 1996). Red-cockaded woodpecker clans excavate cavities in living pines, and have established a living and foraging routine in conjunction with the southeastern pine forests and the historical occurrence of fire, which reduces hardwood understory while sparing fire-resistant pines (Jackson, 1986). Much of the pri .....

.... outer layers are thrown off. And, at this same moment, the core collapses. This can happen rather quickly because gravity can crush an object 10,000 miles across to an object only 10 miles across in about one second. During the time that a black hole is created, the star shrinks down to an infinitely small and infinitely dense point know as the singularity. At this point, all we have ever known about the universe breaks down. Around the singularity there is an imaginary circle called the event horizon. This is the black hole’s gravitational boundary where not even light can escape. Once this boundary has been crossed, ther .....

.... and mixed with other metallic elements. Lead was used in ancient times for making coinage, art objects and water pipes. One of the first known toxic substances, lead was used by the Romans for lining aqueducts and in glazes on containers used for food and wine storage; and it is suspected to have resulted in widespread lead poisoning. Members of the famous Franklin Expedition to the Northwest Passage in the mid-1840s met a similar fate, being poisoned from lead in solder, widely used at the time to seal tins used to store foods. Until recently, one of the most significant uses was an anti-knock additive in gasoline. In the 1 .....