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This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..

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

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Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like or..

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The Water Cycle

The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

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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..

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Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the..