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Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..

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Origins of Life on Earth

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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This tutorial deals with the structure and function of flowers, fruits, and seeds. Also included here are the types of f..

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Meiosis – The Genetics of Reproduction

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