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Essays on Science

Yeast
Download This PaperWords: 657 - Pages: 3

... a new bud. This newly created bud then breaks off from the original cell to become an independent cell. is most commonly known to reproduce asexually or reproduce self-fertile. Some produce sexually, but that is only a very minuet number. The most reproduction is created in substances containing much sugar. For some reason or another, this appeals most to the , causing it to grow at a rapid rate. Just like any other organism, in order for to survive they need to have a significant amount of nutrition. Unlike plants, lacks the chlorophyll needed to create its own food. It feeds on the sugar of many different resources to stay alive. Some of th ...



Memory Debate For Psychology
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... such as the seven digits of a phone number while dialing, before the information is either stored or forgotten, activated human activity memories rapidly decay unless used or rehearsed. Encoding can be an automatic process, this occurs when little or no effort, without awareness, and without interfering with our thinking about other things. Encoding can also be effortful processing; although we encode an enormous amount of information unintentionally, many other types of information we remember only with much effort, rehearsal, and attention. We can forget things because of encoding failure. Sometimes we fail to encode information, so it never entered the me ...



The Destruction Of The Ozone Layer
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... then attaches with other oxygen molecules to form O3. O3 is ozone. So when ozone is formed, harmful rays from the sun are absorbed. The O3 molecule is very reactive and it bonds easily with other molecules it the atmosphere. When and oxygen atom from the ozone reacts with a chloride ion from chlorine monoxide, the ozone molecule is destroyed. So chlorine monoxide is an ozone destroyer. There is always a certain amount of chlorine monoxide in the atmosphere. It is important to remember that ozone is constantly being created and destroyed in the atmosphere. The amount of ozone in the atmosphere is based on these reactions. There are many factors that influence the a ...



Genetic Engineering
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... is in the agricultural sector. Plants are genetically engineered to be resistant to herbicides. Insects are being genetically engineered to attack crop predators. Wald noted that research is ongoing in growing agricultural products directly in the laboratory using genetically engineered bacteria. Genetically engineered animals are being developed as living factories for the production of pharmaceuticals and as sources of organs for transplantation into humans in the United States and abroad. Fish are being genetically engineered to grow larger and at a faster rate. According to U.S. News and World Report, many pharmaceutical drugs, including insulin, are alread ...



How Various Mechanisms By Which Substances Cross The Cell Me
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... concentration is said to have the concentration gradient. It drives diffusion because substances always move down their concentration gradient. The pressure gradient also plays a role in diffusion. Where this is a pressure gradient there is motion of molecules. The pressure gradient is a difference in pressure between two different points. If the concentration of one side of the membrane is greater than the molecules will travel from the higher to lower concentration. Eventually there will be a dynamic equilibrium and there will be no net movement of molecules from one side to the other. Osmosis is the diffusion of water. Like diffusion, the wa ...



Electronic Stimulation
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... of intense heat. This includes electric stimulation of nerves or muscles, passage of current into the body, or use of interrupted current of low intensity to raise the threshold of the skin to pain. Studies suggested this therapy is applied to conditions such as ulcers, traumatic or burn wounds, osteoarthritis, and cancer. Electrical stimulation is simply the application of electrical pulses to the body, whether it is for function or therapy. The classical and common example is that of the cardiac pacemaker. The range of clinical uses of electrical stimulation has and is growing wider and includes: pain relief (often known as TENS - Transcutaneous Electric ...



White Tigers
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... a dozen have been seen in India in about a hundred years. In fact no sightings have been reported since 1951. This may be caused that the Royal Bengal tiger population has dropped from 40,000 to 1, 800 in the past ten years, and as few as 1 in every 10,000 tigers is white (www.cranes.org/whitetigers.com). are neither albinos nor a special species; they differ from the normally colored tigers by having blue eyes, a pink nose, and creamy white fur with black stripes. Tiger’s stripes are just like a human fingerprint, meaning that no two tigers have the same pattern of stripes. are not usually born from other . They get their color from double recessive allel ...



The Process Of Mitosis
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... copied exactly. The two identical copies of DNA are called a "pair of chromatids" and they are linked together by an item called a "chromomere". During this stage a store of ATP is also built up. [Best put a labelled diagram of a cell during Interphase here.] Prophase --------------------------------------- In this second stage changes to the cell become visible. The chromosomes condense, coiling 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 af ...



Origin Of The Solar System
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... its angular motion through its magnetic interaction with the outflowing solar wind, so that this feature should not have been considered a constraint on theories of the origin of the solar system. The many theories concerning the origin of the solar system that have been advanced during the last three centuries can be classified as either dualistic or monistic. A common feature of dualistic theories is that another star once passed close to the Sun, and tidal perturbations between the two stars drew out filaments of gas from which the planets condensed. Theories of this type encounter enormous difficulties in trying to account for modern information ab ...



The History Of White-Tailed Deer In Kentucky
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... deer breeding season in Kentucky runs from October through mid January, reaching its peak in November. Most fawns are born in June, following a seven month gestation period. Newborn fawns will weigh about four pounds at birth. Deer offspring are cared for and may remain with the mother until the next spring. Fawns retain their spots until mid September and nurse until mid October. About 40 percent of female fawns breed during their first autumn, but usually bear only one fawn. Does breeding at age 1 1/2 or older generally have twins, and sometimes triplets. By November, Kentucky's deer population typical increases slightly more than one fawn per doe. Althou ...




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