.... up to about 5% of their original length, now clearly visible when a stain is added. The centrioles move to the opposite poles of the cell and small microtubules around the centrioles become visible (called "Asters"). The nuclear membranes and nucleolus disintegrate after passing their nucleic acids to certain pairs of chromatids. Now a spindle forms, this is also made out of microtubules. [A labelled diagram of the end of the Prophase stage of a cell here would be great.] Metaphase --------------------------------------- During this stage the chromosomes move towards the equator of the spindle, attaching themselves horizont .....

.... internal space formed by the membrane sheets is known as the ER lumen. In most cells the ER lumen forms a single internal compartment. The membranes of other organelles are not connected to the ER and appear to form separate distinct compartments within the cytoplasm. The ER membranes and lumen contain a large number and variety of enzymes which catalyse many different types of chemical reactions. In some cases the membranes serve as a framework for systems of enzymes that carry out sequential biochemical reactions. Other ER enzymes are located within the ER lumen. If labelled amino acids are introduced into live cells, the radioac .....

.... spread across the nation and world we can only expect a far larger usage of such technological tactics, being used in the home, workplace, and even international politics. Schwartau’s definition of is, “the use of information, and information systems as both weapons and targets in a conflict,” (Schwartau 12). We are now living in a time when knowledge is power, and what is knowledge made up of? Quite simply, information. is not only becoming more rampantly used among people, but they are using different types as well. There are three different classifications of . The first one deals with personal . .....

.... rays are often used in the food industry. The radioisotopes preserve foods. Although the rays never come in contact with the food, Beta radiation kills various organisms such as bacteria, yeast, and insects. Gamma rays are sometimes used in science. They are used to detect Beryllium. They also played a very important role in the development of the atomic bomb. Gamma Rays can be very dangerous to use or be in contact with. Gamma rays bombard our bodies constantly. They come from the naturally radioactive materials in rocks and soil. We take some of these materials into our bodies from the air we breath and the water we drink. Gamm .....

.... days. Sunlight increases the rate of these reactions. Rainwater, snow, fog, and other forms of precipitation containing these mild solutions of sulfuric and nitric acids fall to the ground as acid rain. Years ago, when smokestacks were only a few stories tall, pollution from the smokestacks usually stayed near the ground and settled on the land nearby. This only caused unhealthy conditions for plants and animals near the smokestacks. To reduce this pollution, the government passed laws permitting the construction of very tall smokestacks. At the time, people thought that if the pollution was sent high into the air it w .....

.... larch and a deciduous needleleaf. Global Climate and Species Adaptations Nome, Alaska is located in ET/Dwd of Koppen climatic classification. Most of this area experiences permafrost condition. Temperature of the warmest month is between 0-10C. Continuous snow covers the land for 8 – 10 months. Total annual PRECIP for Nome is 14.88mm. Daylength varies greatly throughout the year. Nome experiences long, cold winter and cool summer. Precipitation exceeds small potential evapotranspiration demand. Nome vegetation is low, ground level herbaceous plants, and some woody species. Root can penetrate only about 1 meter. Soils in t .....

.... 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 clones are created in the future, the genetically created humans will only be good for “target practice” (Epstein 2). Another survey by the same magazine was conducted and found that 50% of those who were questioned believe that clones should be treated as .....

.... worms copying sea anemones, and roaches imitating ladybugs. There are even animals that look like themselves, which can also be a form of impersonation. The phenomenon of mimicry, as it's called by biologists, was first noted in the mid-1800s by an English naturalist, Henry W. Bates. Watching butterflies in the forests of Brazil, Bates discovered that many members of the Peridae butterfly family did not look anything like their closest relatives. Instead they bore a striking resemblance to members of the Heliconiidae butterfly family. Upon closer inspection, Bates found that there was a major advantage in mimicking .....

.... 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 affected include: the Savannas of Africa, the Great Plains and the Pampas of America, the Steppes of Asia, the Outback of Australia, and the margins of the Mediterranean (World Atlas of Desertification, 1997). Some of the leading causes of desertification are due to human .....

.... rose and propelled them over the walls. Hundreds of homes, streets, and businesses were washed away, and those that remained standing found themselves anchored beneath several feet of mud and debris. In some places, the stench is overpowering. The smell from intermingled garbage, rotting food, rancid floodwater, animal and -- very possibly -- human corpses fills the air. Yet still people work near the water, clean goods in it, even bathe in it. The potential for disease cannot be understated. Homeowners squat along the muddy, contaminated waters, rinsing clothing, dishes, photographs -- anything that can be salvage .....