A Clouded Past History is as foggy and undiscovered as the future‚ indeed the textbooks our parents read in school are radically different from those that we learn from today. And our children will no doubt learn a history that we can only imagine in our present. As our technology develops‚ we find new ways to discover the past and‚ in many cases‚ that discovery disproves theories we previously held about ancient times. One such example can be found in a new theory that
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Disaccharides Sucrose A crystalline disaccharide of fructose and glucose‚ C12H22O11‚ found in many plants but extracted as ordinary sugar mainly from sugarcane and sugar beets‚ widely used as a sweetener or preservative and in the manufacture of plastics and soaps‚ also called saccharose. Sucrose is one of the main products of photosynthesis and the most common transport sugar in plants. It is also a no reducing disaccharide‚ and is synthesized in the cytosol via the phosphorylated intermediate
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Biodegradable Plastic from Gabi Leaves By: Mickaela Olan 9-Apple PLASTIC • A plastic material is any of a wide range of synthetic or semi-synthetic organic solids that are moldable. Plastics are typically organic polymers of high molecular mass‚ but they often contain other substances. They are usually synthetic‚ most commonly derived from petrochemicals‚ but many are partially natural. ADVANTAGES OF PLASTIC: • Advantages of plastic are light in weight. • They can be easily moulded and have
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America. In Central America‚ Kamote tops were domesticated at least 5‚000 years ago. Sweet potatoes are native to Central America and are one of the oldest vegetables known to man. They have been consumed since prehistoric times as evidenced by sweet potato relics dating back 10‚000 years that have been discovered in Peruvian caves. Christopher Columbus brought sweet potatoes to Europe after his first voyage to the New World in 1492. By the 16th century‚ they were brought to the Philippines by Spanish
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organized into a ring 3. Dicot stem xylem form a ring around the outside whereas monocot xylems are scattered 9.1.3 Distribution of tissues in leaves and functions In the leaf you have xylem and phloem tissues. Xylem tissues act like transport tubes‚ transporting water and minerals. Phloem tissues are used to transport sugars and water (sap). When each of these tissues are connected with each other throughout the plant‚ they form a circulatory system. 9.1.4 modification of roots * Roots become
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Case Study: Urinary‚ Fluid & Electrolyte balance The cardiovascular system and the urinary system are intimately entwined. When the cardiovascular system experiences stress‚ the urinary system can be directly impacted. For example in hemorrhagic shock‚ when the body is rapidly depleted of circulating blood volume‚ the kidneys are often one of the first vital organs affected due to lack of perfusion. The kidneys are dependent on the sufficient cardiac output that the heart delivers. So when the
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a schoo Chapter 35 The Plant Body 1. Describe and compare the three basic organs of vascular plants. Explain how these basic organs are interdependent. The three basic organs of a vascular plant are the stems‚ leaves‚ and roots. The stems consist of nodes‚ where leaves attach‚ and internodes between the nodes. The stem is responsible for elongation of the plant and acts as a central axis for other organs to attach to. The roots help to anchor the plant as well as absorb water and nutrients
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Plant Physiol. (1 996) 1 1 1 : 275-283 Sugar Accumulation in Grape Berries Cloning of Two Putative Vacuolar lnvertase cDNAs and Their Expression in Grapevine Tissues Christopher Davies* and Simon P. Robinson Cooperative Research Centre for Viticulture‚ P.O. Box 145‚ Glen Osmond‚ South Australia‚ Australia‚ and Commonwealth Scientific and industrial Research Organization‚ Division of Horticulture‚ G.P.O. Box 350‚ Adelaide‚ South Australia 5001‚ Australia The growth pattern of developing
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EXCRETORY SYSTEMS C All work in the same basic way: Body fluid is filtered by a special organ. Selectively permeable membranes remove urea or uric acid. Osmolarity is controlled by selective reabsorption/secretion. C 5 types of excretory systems: None in porifera‚ cnidaria Protonephridia in planaria & rotifers Metanephridia in annelids Malpighian tubules in terrestrial arthropods Kidneys (with nephrons) in vertebrates Protonephridia Have flame bulbs‚ tubules‚ and nephridopores. C Flame bulbs
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education BIOLOGY Paper 1 Multiple Choice May/June 2004 45 minutes Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 0610/01 READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer sheet in the spaces
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