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

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Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

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Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

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The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..

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Adaptation Tutorial

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