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The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..

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Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..

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Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

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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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This tutorial elucidates body temperature regulation. Know the details here to learn how the body sets the body temperat..