.... accomplished with mammals (Lawren). Another way to make a clone, as they do in the cattle buisness, is to split the cells of a early multi-celled embryo which will form two new embryos (Lawren). For it to get started into practice it took more than fifty years of questioning and testing. The first successful cloning experiment involved a leopard frog. It took place in, 1952 with group of scientist from the Institute for Cancer Research in Philadelphia (Lawren). To clone the frog they used an embryonic frog cell nucleus(Margery). 1962, John Gurdon of Cambridge University .....

.... after entering the mines. It was two german doctors, Harting and Hesse, who brought this to the public. The doctors found that 75 percent of the miner deaths were due to lung cancer. But with their scientific knowledge the doctors could only assume that the deaths were caused by the inhalation of arsenic. Later studies between 1900 and 1940 found that the deaths were caused by radiation in the mines. The radiation the miners were exposed to would later be identified as uranium. Uranium is a natural occurring element, it has a atomic count of 92. Uranium is easily identified .....

.... play a key role in many of the important processes of life and industry. in the biosphere is essential in the processes of respiration and metabolism, the means by which animals derive the energy needed to sustain life. Furthermore, is the most abundant element at the surface of the Earth. In combined form it is found in ores, earth’s, rocks, and gemstones, as well as in all living organisms. is a gaseous chemical element in Group VA of the periodic table. The chemical symbol for atomic is O, its atomic number is 8, and its atomic weight is 15.9994. Elemental is know .....

.... long-term memory. Sensory memory is the shortest and less extensive of the others. It can hold memory for only an instance (Memory p. 32). Suppose you see a tree , the image of the tree is briefly held by the sensory memory and quickly disappears unless you transfer it to your short-term memory (Rhodes p. 130). The next level is called short-term memory. The image or fact can be held as long as the brain is actively thinking about it (Loftus p. 392). For example , if you look up a number in the phone book and repeat it to yourself until you dial it , that is a form of short-te .....

.... and similar objects. Like carbon dioxide, the CFCs are trapping more heat in the earth's atmosphere. CFCs have also been blamed for ozone depletion. CFCs are suspected of breaking down ozone particles that shield us from the sun's ultraviolet rays. Too many ultraviolet rays can cause cataracts and skin cancer. A hole in the ozone has been discovered over Antarctic the size of the United States. The hole is actually where the ozone has been depleted or thinned by the CFCs. The use of aerosol cans accounts for most of the release of CFCs. This resulted in the Unit .....

.... storing radioactive wastes is by a process called 'vitrification'. Vitrification is a semi-continuous process that enables the following operations to be carried out with the same equipment: evaporation of the waste solution mixed with the additives necesary for the production of borosilicate glass, calcination and elaboration of the glass. These operations are carried out in a metallic pot that is heated in an induction urnace. The vitrification of one load of wastes comprises of the following stages. The first step is 'Feeding'. In this step the vitrification receives a co .....

.... or immature. In Granulocytic Leukemia this causes an increase in white blood cells known as granulocytes. Granulocytes are made in the bone marrow, and other tissue. Granulocytes that are affected by leukemia cannot fight of infections. There are two ways in which leukemia can occur. One is acute, and the other is chronic. Acute leukemia is found most in children. It progresses rapidly. Acute leukemia causes red blood cells to decrease, the cells are then replaced by abnormal ones. This causes anemia. Life expectancy is short without proper treatment. Ch .....

.... a majority of our weather takes place. Beyond the troposphere is the second region of the atmosphere, the stratosphere. The stratosphere extends from roughly 6.5-30 miles from the earth's' surface. The air on this region is much less dense than in the troposphere, and it's a lot drier. The stratosphere is the area that contains the majority of the ozone layer. Past the stratosphere is the mesosphere which extends to 50 miles above the planet. The last region is the thermosphere. The thermosphere's outermost edge is roughly 600 miles above the surface of the earth. Be .....