Cell: The cell is the basic structural‚ functional and biological unit of all known living organisms. Cells are the smallest unit of life that is classified as a living thing‚ and are often called the "building blocks of life". Discoverer: The cell was discovered by Robert Hooke in 1665. The cell theory‚ first developed in 1839 by Matthias Jakob Schleiden andTheodor Schwann‚ states that all organisms are composed of one or more cells‚ that all cells come from preexisting cells‚ that vital functions
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Sickle cell disease and the hope of stem cell therapies; ethics in the treatment sickle cell. The past half century has been an era of rapid discoveries: from the humble beginnings of molecular biology‚ discovery of the structure of DNA‚ research on recombinant DNA‚ the discovery of the human embryonic stem cell (ESC)‚ the completion of the Human Genome Projects‚ mammalian cloning and the discovery of ntESCs (nuclear transfer ESCs) by somatic cell nuclear transfer and the ethical sigh of relief
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Lesson 35‚ 莊子秋水 (3) 河伯曰：「若物之外，若物之內，惡至而倪貴賤？惡至而倪小大？」北海若曰：「以道觀之，物無貴賤； The earl of the He said‚ ’Whether the subject be what is external in things‚ or what is internal‚ how do we come to make a distinction between them as noble and mean‚ and as great or small?’ Ruo of the Northern Sea replied‚ ’When we look at them in the light of the Dao‚ they are neither noble nor mean. 以物觀之，自貴而相賤：以俗觀之，貴賤不在己。以差觀之，因其所大而大之，則萬物莫不大；因其所小而小之，則萬物莫不小。 Looking at them in themselves‚ each thinks itself noble‚ and despises others
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Cell wall is a fairly rigid‚ protective and supportive layer surrounding the cell external to plasma membrane of plants‚ bacteria‚ archaea‚ fungi and algae. It is absent in animals and most protists. It was first observed by Robert Hooke in 1665. It is not an entirely rigid structure as the cell wall expands due to the growth of the cell. It varies in thickness from o.1mm to I0mm.in most of the cells‚ cell wall is present from the very beginning to the last‚ but in slime molds (myxomycetes)
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Nucleic Acid Structure & Function Charlotte V. Bañes‚ MD Department of Biochemistry Introduction ORGANISM Store and preserve information Pass information to future generations Express information during life’s processes GENETIC INFORMATION Coded along a polymeric molecule (DNA) the chemical basis of heredity Organized into genes units of DNA that encodes a protein or DNA Central Dogma of Molecular Biology Gene Expression & DNA Replication “The genetic information
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Don’t Sweat Small Stuff ….and it’s small stuff By Richard Carlson The book is a publication of 1997. It contains a collection of strategies and short essays that the author-Richard Carlson has seen work in his clients and audience. Given the current fast life and all that comes with it‚ the demands of life and the culture today takes a toll on people despite the efforts to shake them off. In his book‚ Richard seeks to help you focus on what matters and ignore anything that drains up your energy unnecessarily
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The Effects of Acid Rain Bio-105 Abstract The effects of acid rain is damaging no matter how you look at the picture. Acid rain effects open areas more than forests due to the trees blocking some of the rain from hitting the ground. Acid rain is monitored by using emissions monitors. This helps figure out how much acid is in rainwater. Acid rain is harmful to fish by killing off entire species. Acid rain is harmful to living creatures‚ but many do not realize how toxic it can be to
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VIDEO 4: ADJECTIVES Exercise 1. Match to form noun phrases. (Ghép các tính từ và danh từ tương ứng ở 2 cột sau để tạo ra các cụm danh từ đúng) 1. homeless 2. careless 3. comfortable 4. famous 5. industrial 6. useful 7. enjoyable 8. cloudy 9. wild 10. developing | a. mistake b. country c. animal d. family e. chair f. party g. actor h. advice i. morning j. zone | KEY: 1d‚ 2a‚ 3e‚ 4g‚ 5j‚ 6h‚ 7f‚ 8i‚ 9c‚ 10b. Exercise 2: Rewrite the sentences below
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The Role of the Citric Acid Cycle The Citric Acid Cycle is a series of enzyme-catalysed reactions that take place in the mitochondrial matrix of all aerobic organisms. It involves the oxidation of the acetyl group of acetyl CoA to two molecules of carbon dioxide. Each cycle produces one molecule of ATP by substrate-level phosphorylation‚ and reduces three molecules of NAD and one molecule of FAD for use in Oxidative Phosphorylation. The cycle is preceded by Glycolysis‚ which also occurs in anaerobic
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main cell components‚ these consist of the nucleus‚ nuclear membrane‚ mitochondria‚ lysosomes‚ Golgi apparatus‚ cell membrane‚ ribosomes‚ cytoplasm and endoplasmic reticulum both rough and smooth. Images: [3] Every human body has billions of microscopic units called cells. Cells carry out numerous of chemical reactions and processes that make up the essence of life. The structure of cells varies in size and shape and has different functions. There are four main features with in a cell and these
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