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Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..

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Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..

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The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

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This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

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Kidneys and Regulation of Water and Inorganic Ions

The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

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Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..