------------------------------------------------- The Processes of the nitrogen cycle Nitrogen fixation Atmospheric nitrogen must be processed‚ or "fixed" (see page on nitrogen fixation)‚ in order to be used by plants. Some fixation occurs in lightning strikes‚ but most fixation is done by free-living or symbiotic bacteria. These bacteria have the nitrogenase enzyme that combines gaseous nitrogen with hydrogen to produce ammonia‚ which is then further converted by the bacteria to make their own organic
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A cycle is defined as any complete round or series of occurrences that repeats or is repeated in the same order and at the same intervals. The natural existence of cycles is highly important without cycles resources would run out and organisms would die. The amount of carbon nitrogen and oxygen on the earth is fixed‚ they can exists in different forms but no more may be added. So that these don’t run out they are cycles so they may be reused. Photosynthesis and respiration are the reverse of each
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NITROGEN CYCLE IN SURFACE WATER BODIES by: yusra shamsudin 1.0 Nitrogen Nitrogen is very essential to all living matters especially to plant‚ animal and human. The source of nitrogen is from the atmosphere and it is exists as a molecule composed of two atom of nitrogen that is bonded together by triple bond. Figure 1: Nitrogen Source: anyone4science.blogspot.com 2.0 Nitrogen Cycle Nitrogen cycle is the transformation of nitrogen from one form to another. For living organism
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The Carbon Cycle is a complex series of processes through which all of the carbon atoms in existence rotate. The same carbon atoms in your body today have been used in countless other molecules since time began. The wood burned just a few decades ago could have produced carbon dioxide which through photosynthesis became part of a plant. When you eat that plant‚ the same carbon from the wood which was burnt can become part of you. The carbon cycle is the great natural recycler of carbon atoms. Unfortunately
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Chapter 10 (Business Cycles) Business Cycles (business Flucuations) The ups and downs in economy wide economic activities are called business cycles or busyiness fluctuations. When business fluctuations are positive they are called expansion‚ the opposite of expansion is contraction which is slow down in the pace of national economic activities. Phases of the business cycle over a several year period 1. A peak is when business activity reaches a temporary maximum with full employment and near
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time are inevitable. And while these fluctuations are the result of natural interactions between sellers and buyers‚ government intervention also affects these intervals. The business cycle is unavoidable because‚ in part‚ it is the economical representation of a volatile element: human psychology. In the example above‚ consumers are predictable. But we all know consumer preferences and their senses of well-being change‚ sometimes overnight. The new fashion‚ the hot stock‚ the trendy social cause
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The cell cycle‚ or cell-division cycle‚ is the series of events that take place in a cell leading to its division and duplication that produces two daughter cells. In cells without a nucleus‚ the cell cycle occurs via a process termed binary fission. In cells with a nucleus‚ the cell cycle can be divided in three periods: interphase—during which the cell grows‚ accumulating nutrients needed for mitosis preparing it for cell division and duplicating its DNA—and the mitotic phase‚ during which the
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Page 1 of 3 In order to learn more about interpersonal communication and how to improve my skills‚ I had conversations with two very different people. The first person that I spoke to was my mother. We are very close and it is easy to talk to her. On April 24‚ 2009‚ we sat outside on her deck and discussed the employment opportunities that will become available to me when I graduate from Penn Foster. The entire exercise took only fifteen minutes. My second conversation was about
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CYCLES IN BIOLOGY This essay will give examples of cycles in biology from different scales of magnification‚ ranging from molecular level to populations and ecosystems. Cycles are sequences of events which repeat themselves in the same order‚ one event leading to the next. There are many examples of these in Biology. Cycles can be seen even at a molecular level in the body. An example of this would include the passage of action potentials down neurones in the nervous system. When the cell membrane
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Water Cycle By: Ricayanna Clarke Mr.Fraizer 804 Science TABLE OF CONTENTS 1. INTRODUCTION 2. CHAPTER 1 – The Water Cycle 3. CHAPTER 2 - What is Evaporation? 4. CHAPTER 3 - Condensation 5. CHAPTER 4 - Precipitation 6. CHAPTER 5 - Major sources of water 7. CHAPTER 6 - Where are places that irrigation would be common? 8. CONCLUSION 9. BIBILIOGRAPHY INTRODUCTION The reason why I chose this topic is because I was interested in the water cycle. The water cycle caught
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