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Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..

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Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

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Human Biology – Food and Digestion

This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

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Plant Metabolism

Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..

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Pollution in Freshwater Ecosystems

There are many environmental factors that arise due to the usage of water in one way or another and for every action tha..

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