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The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

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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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This tutorial looks at the mutation at the gene level and the harm it may bring. Learn about single nucleotide polymorph..

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Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

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This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

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Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..