.... G2 phase. Actual occurs in M phase (mitosis). Mitosis has four sub-phases, prophase, metaphase, anaphase, and telophase. In prophase, the nucleoli disappears and the chromatin fibers become discrete chromosomes. The mitotic spindle also beings to form and the centrioles begin to move towards opposite ends of the cell. Also occurring later in prophase, the nuclear envelope fragments, and the microtubles attach to the kinetochores and overlap. In Metaphase, the chromosomes line up along the metaphase plate. The centromeres are all aligned and the sister chromatids straddle the metaphase plate. Anaphase beings when the sister chromatids are pulled away from each other ....

.... often is associated with eczema, a skin inflammation that may reflect the tendency of the child to develop hypersensitivity reactions. The attacks usually become less frequent and less severe over the years and disappear in about half of all affected children before adulthood. In one form of asthma, called intrinsic asthma, however, the attacks become less frequent and less severe, but recovery between them is less complete. The bronchi in such patients become chronically narrowed, causing a progressive loss of capacity for physical exertion. The prevalence of asthma is only about 1 or 2 percent worldwide but varies greatly from country to country. In the United States, ....

.... of these are Oxygen 49.2%, Silicon 25%, and Aluminum 7.5%. Then the next most abundant elements are Iron 4.7%, Calcium 3.4%, Sodium 2.6%, Potassium 2.4%, Magnesium 1.9%, Hydrogen 0.9%, titanium 0.6%, Chlorine 0.2%, Phosphorus Manganese and Carbon are all 0.1%, Sulfur 0.05% Barium 0.04%, Nitrogen 0.03% and the rest of the elements on the periodic table take up about 0.5%. The elements of the crust are graphed below, but only ones that are the most abundant due to the fact that the abundance of the other elements of the crust are too low to graph accurately on one graph. Almost all elements are found as compounds, however Oxygen, Nitrogen, and to a lesser extent sulf ....

.... with visibility and causing human discomfort. Attempts to control pollution, initiated during the 1950s, resulted in the successful elimination of such sources of pollution as industrial effluents and the outdoor burning of trash and debris. Nevertheless, pollution continued to increase as a result of the increased number of motor vehicles. Exhaust fumes from the engines of automobiles contain a number of polluting substances, including carbon monoxide and a variety of complex hydrocarbons, nitrogen oxides, and other compounds. When acted upon by sunlight, these substances undergo a change in composition producing the brown, photochemical smog for which Los Angeles is well k ....

.... for self fulfillment or for the good of society? Within the contents of this paper, I will analyze the elements of individualism and collectivism that exist in the controversial topic of cloning. When Dr. Ian Wilmut, a 52-year-old embryologist at the Roslin Institute in Edinburgh announced on that he had replaced the genetic material of sheep's egg with the DNA from an adult sheep, and created a lamb (Dolly), the topic of cloning "created" many new questions of its own. None were as controversial as: Will they apply this to humans as well? According to Dr. Wilmut, the answer was "there is no reason in principle why you couldn't do it"(clone humans), but he added ....

.... in running bipeds can be explained by changes in the time available to generate force. The rate of force generation also explains differences in metabolic rate over the size range of birds measured. However, for a given rate of force generation, birds use on average 1.7 times more metabolic energy than quadrupeds. The rate of energy consumption for a given rate of force generation for humans is intermediate between that of birds and quadrupeds. These results support the idea that the costs of muscular force production determines the energy cost of running and suggest that bipedal runners use more energy for a given rate of force production because they require a greate ....

.... and had little or no scientific education. Leeuwenhoek also confirmed the discovery of capillary systems. Theodor Schwann a German physiologist born in Neuss and educated at the universities of Bonn, Wurzburg, and Berlin, Schwann was involved in the study of the structure of plant and animal tissues. Along with Matthias Jakob Schleiden a German botanist, Schwann proposed the cell theory. The cell theory has three parts: 1. All organisms are composed of cells. 2. Cells are the basic units of structure and function in organisms 3. All cells come from preexisting cells. The impact on science was very great due to the discovery of cells and the cell theory. M ....

.... 40% more oxygen than any other plant. Marijuana is the most widespread drug in the world, if only hemp could be the most widespread crop in the world. Marijuana is a plant, with the botanical name of . Marijuana is a weed that grows wild and is cultivated in many parts of the world. Containing 419 chemicals, this plant has the ability to intoxicate its users, primarily because of the psychoactive mind altering ingredients called Delta - 9 - Tetrahydrocannabinol, or THC. It is the THC content found at various concentration in different parts of the plant, which determines the potency. The THC content is controlled by plant strain, climate, soil conditions, and harv ....