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The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..

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Neurology of Illusions

Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

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ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

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Takahē (Porphyrio hochstetteri)

Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..

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Gene Action – Operon Hypothesis

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 mutation at the gene level and the harm it may bring. Learn about single nucleotide polymorph..