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The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..

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Freshwater ecosystem is comprised of four major constituents, namely elements and compounds, plants, consumers, and deco..

Origins of Life on Earth
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..

Ecosystem Succession
Ecosystem Succession

If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..

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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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Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..