.... is necessary in assembling genetic diversity in plant crops. In certain geographical areas there has existed a rich source of variability in crop plants but the encroachment of civilization has reduced the natural variability inherent in primitive plant forms and related species of crop plants. Agricultural process, as a result of new breeding programs, has reduced rather than increased crop variability as improved cultivars, or varieties, are planted in wider and wider areas and old cultivars, which may contain valuable genes, are lost. Crop failures, w .....

.... with a positive charge runs down the center of this cylinder. The voltage across the wire and cylinder is kept just below the point at which a spontaneous discharge, or spark, occurs. When a charged particle or gamma ray enters the tube , it ionizes a gas atom between the copper cylinder and the wire. The positive ion produced is accelerated toward the copper cylinder by the potential difference. The electron is accelerated toward the positive wire. As these new particles move toward the electrodes, they strike other atoms and form even more ion in their path. Thus an avalanche of charged particles i .....

.... drylands have been central in the evolution of mankind. These are the lands that sustained our transition from a hunting/gathering to pastoralism and agriculture (Kaya and Yokobiri, 1997). Drylands still provide much of our grain and livestock. These areas cover more than 40 percent of the world’s land surface. As these areas decrease in size, so does the reliability of the land to support the human population. In some areas, desertification is occurring to such a degree that some lands can no longer sustain life. Large regions which have been greatly affec .....

.... Theoretical studies of a-life, however, had been in progress long before the 1980s. Most notably, the Hungarian-born U.S. mathematician John VON NEUMANN, one of the pioneers of computer science, had begun to explore the nature of very basic a-life formats called cellular automata (see AUTOMATA, THEORY OF) in the 1950s. Cellular automata are imaginary mathematical "cells" --analogous to checkerboard squares--that can be made to simulate physical processes by subjecting them to certain simple rules called algorithms (see ALGORITHM). Before his death, von Neumann h .....

.... motion is: An object at rest will stay at rest and an object in motion will stay in motion unless a force makes the object change its state of rest or motion. This means the rocket balloon won't start until you let go of the closing (hole). It wont stop until it runs out of air or something is in the way of its' path. The second law of motion is: The acceleration of an object increases as the amount of force causing the acceleration increases. This means the more air in the balloon the farther and faster it goes. The third law of motion is: For every acti .....

.... genetically constructed humans, and other genetically created figures, are wrong and should be stopped (Epstein 5). Overwhelming textual evidence proves that genetic engineering is not beneficial to society. Accordingly, genetic engineering is unethical and therefore should be stopped. One reason why genetic engineering should cease is because genetic engineering disrupts society’s moral values and causes society to act out in destructive ways. An online survey done by Time Magazine in 1997, found that 11% of those who were interviewed believe that if .....

.... equipment, and have controlled amounts of caffeine. The tasks for the participants would be to carefully follow the instructions of the experimenter, that is to hit the baseball. 3) Will you treat all the participants in the same way? No, I would not treat all the participants in the same way. The control group would not be given caffeine. However, I would treat all experimental groups the same because that will give more accurate results. If the participants were not treated the same I would not be able to accurately measure how much or how little the caff .....

.... still make steroids even without the release of GnRH. Since these children are still producing steroids without GnRH being released, low doses of Provera are not effective. For the body to produce steroid hormones it must convert cholesterol into estrogens and other related substances. In order for this process to take place, several steps are involved which are controlled by a certain enzyme. In knowing this, Lee wanted to find out if blocking the action of an enzyme would be reached with high doses of Provera. What Lee and Auchus found out was that .....