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The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..

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Bryophytes are a plant group characterized by being nonvascular. They include the mosses, the liverworts, and the hornwo..

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Principles of Hormonal Control Systems

Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

Independent Assortment and Crossing Over
Independent Assortment and Crossing Over

This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..

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Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

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New Zealand’s Unique Fauna

Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate..