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    Cell and Skill

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    increases in complexity? A) ecosystem‚ population‚ organ system‚ cell‚ community‚ molecule‚ organ‚ organism‚ tissue B) cell‚ molecule‚ organ system‚ organ‚ population‚ tissue‚ organism‚ ecosystem‚ community C) organism‚ organ system‚ tissue‚ population‚ organ‚ community‚ cell‚ ecosystem‚ molecule D) molecule‚ cell‚ tissue‚ organ‚ organ system‚ organism‚ population‚ community‚ ecosystem E) ecosystem‚ molecule‚ cell‚ tissue‚ organism‚ organ system‚ organ‚ community Answer: D Topic:

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    Specialized Cell

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    SPECIALIZED CELL ANIMAL Sperm cells PLANT Xylem cells are specialised to find a female cell (egg cells) and join with it. They have tails‚ that makes them move in water to find and fertilize the female cell. They can move because they have many mitochondria located between the tail and the head‚ which gives them energy. In the head‚ there is a vacuole filled with acrosome‚ which is a specialized Lysosome that releases enzymes in order for the Sperm Cell to break into the Egg Cell‚ through the

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    Onion Cell

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    fundamentals of science. Title An investigation of an onion cell using a light microscope. Aim: The aim of this investigation is to identify the cells within an onion skin using a light microscope. An onion cell is a plant cell which through the light microscope‚ it should outline the cell wall‚ cell membrane and the nucleus. Introduction: Plant cells have a cell wall and cell membrane which animal cells do not have. The cell wall provides support and is relatively rigid‚ which consists of

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    Stem Cells

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    Stem Cells and Tissue Renewal 1 The Multicellular “Habitat” • Cells of multicellular organisms – highly specialized – over 200 types in human body • Arranged into tissues‚ organs‚ organ systems • Unable to survive outside body “habitat” skin wont survive in heart tissues. They all start up identicals 2 Specialized Cell Types • Cells of early embryo identical • Differentiation results in specialized cell types – some differentiated cells continue to divide – many others are

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    tissue culture

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    Plant Cell Rep. 18: 873-878 Rajakaruna N‚ Harris CS‚ Towers GHN (2000) Raja Reddy K‚ Sudarsanam G‚ Gopal Rao P (1989) Plant drugs of Chittoor District‚ Andhra Pradesh‚ India Res 27:41–54 Retnam KR‚ De Britto AJ (2003) Sahoo‚ Y.; Chand‚ P. K. (1998) Micropropagation of Vitex negundo L.‚ a woody aromatic medicinal shrub‚ through high frequency axillary shoot proliferation Sanyal M‚ Dutta Gupta S‚ Jana MK‚ Kundu SC (1998) Shoot organogenesis and plantlet regeneration from leaf callus cultures of Saxena

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    the size of cheek cell and onion cell DCP: Introduction: In this experiment‚ Onion cells (Allium cepa) Cheek cells (Homo sapiens) were measured and compared. The aim of this experiment is to find out how both cells differ by comparing their size. Onion cells (Allium cepa) is plant cell and Cheek cells (Homo sapiens) is an animal cell. Hypothesis: The size of an animal cell (Homo sapiens) should be smaller than a plant cell (Allium cepa). Because a plant cell has cell wall which is to maintain

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    Every cell in the body goes through a life cycle. Cells grow and divide to replace cells that are lost because of normal wear and tear or injury to them. All cells grow and die at different rates. The cell cycle can be divided into three periods: interphase‚ the mitotic phase‚ and cytokinesis. During interphase‚ the cell grows‚ accumulating nutrients needed for mitosis‚ preparing it for cell division and duplicating its DNA. During the mitotic phase‚ the cell splits itself into two distinct daughter

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    The Cell Cycle

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    CHAPTER 12- THE CELL CYCLE I. Concept 12.1- Cell division results in genetically identical daughter cells A. Overview 1) The continuity of life is based on the reproduction of cells or cell division. 2) The cell division process is an integral part of the cell cycle‚ the life of a cell from the time it is first formed from a dividing parent cell until its own division into two cells. B. Cellular Organization of the Genetic Material 1) A cell’s endowment of DNA‚ its genetic

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    History of Cell Biology

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    The cell theory‚ or cell doctrine‚ states that all organisms are composed of similar units of organization‚ called cells. The concept was formally articulated in 1839 by Schleiden & Schwann and has remained as the foundation of modern biology. The idea predates other great paradigms of biology including Darwin’s theory of evolution (1859)‚ Mendel’s laws of inheritance (1865)‚ and the establishment of comparative biochemistry (1940). First Cells Seen in Cork While the invention of the

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    stem cell

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    Stem Cell Research From the Viewpoint of Dr. Gamal Serour Anatomy & Physiology 11 September 2013 Anatomy & Physiology 11 September 2013 I am Dr. Gamal Serour‚ I am of the Muslim ethnicity. I am a Professor at Al-Azhar University and Consultant in Obstetrics and Gynecology‚ specializing in infertility treatment. Also the director of the international Islamic Center for Population studies and Research. I believe the study of the stem cell research can be used

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