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The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..

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Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

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Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

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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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Protein Activity and Cellular Metabolism

Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..

Schematic diagram of bacterial lactose operon
Gene Action – Operon Hypothesis

This tutorial focuses on the way genes control and determine every aspect of the body. It describes lac operon as an exa..