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Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

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Indicator Species and Endangered Species

Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..

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

Birth of a Human Baby
Birth of a Human Baby

Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..

Homeostatic Mechanisms and Cellular Communication
Homeostatic Mechanisms and Cellular Communication

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