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

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

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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 sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

Evolution of Life - Ancient Earth
Evolution of Life – Ancient Earth

Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..