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Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..

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There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..

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Digestion and Absorption of Food

The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..

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Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

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This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..