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

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Respiration

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

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The Conscious & Unconscious Nervous System

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

Neurology of Illusions
Neurology of Illusions

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

Geological Periods
Geological Periods

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

Chromosome Mutations
Chromosome Mutations

By nature, the genetic information from both parents is expected to be seen in the offspring following fertilization. Ho..