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This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..

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Freshwater Ecology

Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

Golgi apparatus (3-D illustration)
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Fruits, Flowers, and Seeds

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Early Earth
The Origins of Life

This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..

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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..