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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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Neural Control Mechanisms

Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..

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Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

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Human Reproduction and Fertilization

For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..

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Mendel’s Law & Mendelian Genetics

One of Mendel’s law of inheritance is the “law of dominance”. Read this tutorial to know more about this form of i..

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Fish

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