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Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like or..

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Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

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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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For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..

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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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