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Earth ScienceOrigins of Plate Tectonic Theory
The theory of continental drift was the first step toward plate tectonic theory, which became...
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BiologyLipids
Fats, oils, waxes, steroids, certain plant pigments, and parts of the cell membrane – these...
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BiologyDiscovery and Structure of Cells
Cells are the basic structural and functional unit of life. This module traces the discovery...
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