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This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

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

Adaptation Tutorial
Adaptation Tutorial

Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..

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Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

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