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Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..

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The sequence of amino acids determines the type of protein. Protein is synthesized according to the sequence of nucleoti..

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This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

Geological Periods
Geological Periods

Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

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Plant Water Regulation

Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

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Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..