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Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..

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This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

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Human intelligence provided the means to utilize abstract ideas and implement reasoning. This tutorial takes a further l..

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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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New Zealand’s Unique Fauna

Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate..

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The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..