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Living organisms are made of cells. Animal Cell Plant Cell Structure
Living organisms are made of cells. Animal Cell Plant Cell Structure

... Plant must have chlorophyll in order to photosynthesise, as this is the substance which converts light energy into chemical energy. Chlorophyll traps light energy and converts it into chemical energy for the formation of carbohydrates and their subsequent storage. Therefore, it goes without saying, ...
Animal Basics, Vertebrates, and Invertebrates
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... • Eukaryotic cells with no cell wall or chloroplasts • Heterotrophs by ingestion (digest food inside their bodies) • Bodies are made of diploid cells (gametes are the only haploid cells) • Glucose stored as glycogen (a polysaccharide only found in animals) • Most are mobile at some point in their li ...
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... White Blood Cells (cont.) • Monocytes move into the tissues, where they develop into phagocytic cells (macrophages) that interact with lymphocytes to bring about immune responses • There are two types of lymphocytes: B cells and T cells • Both protect the body against specific threats • B cells mat ...
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... also deep interdigitations of cell membranes (Fig. 2a). The central part possesses numerous mitochondria, profiles of rough endoplasmic reticulum, welldeveloped Golgi complexes, numerous free ribosomes, and polysomes (Fig. 2a,b). The apical parts of some cells contain numerous, small electron-dense v ...
Life Science Reveiw
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IES AZ-ZAIT - Junta de Andalucía

... 3. Answer the following questions: a. What do we call the days when both hemispheres have equal sunlight? b. What do we call the days when the day or night is the longest? c. What is the name of the zone between the two meridians? d. What is the name of the phase of the moon if you can’t see the Moo ...
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Cell theory



In biology, cell theory is a scientific theory which describes the properties of cells. These cells are the basic unit of structure in all organisms and also the basic unit of reproduction. With continual improvements made to microscopes over time, magnification technology advanced enough to discover cells in the 17th century. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, also known as cell biology. Over a century later, many debates about cells began amongst scientists. Most of these debates involved the nature of cellular regeneration, and the idea of cells as a fundamental unit of life. Cell theory was eventually formulated in 1838. This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory. Cell theory has become the foundation of biology and is the most widely accepted explanation of the function of cells.The three tenets to the cell theory are as described below: All living organisms are composed of one or more cells. The cell is the most basic unit of life. All cells arise from pre-existing, living cells, by biogenesis.
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