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

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Plant Auxins – Phototropism & Geotropism

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

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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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Darwin and Natural Selection

This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..