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Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..

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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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Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

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The Conscious & Unconscious Nervous System

This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

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Temperature Regulation in Animals

This tutorial elucidates body temperature regulation. Know the details here to learn how the body sets the body temperat..

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A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..