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Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

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If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..

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..

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Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..

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The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

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Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..