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Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

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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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This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

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Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..

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Homeostatic Mechanisms and Cellular Communication

Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..