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Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..

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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..

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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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Population Regulation in an Ecosystem

With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..

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Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..