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Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..

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

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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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Plants and animals need elements, such as nitrogen, phosphorus, potassium, and magnesium for proper growth and developme..