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This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

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Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

Human Reproduction
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Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..

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Darwin and Natural Selection

This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

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Developmental biology is a biological science that is primarily concerned with how a living thing grows and attains matu..

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Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..