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Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

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This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..

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Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

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According to Charles Darwin's theory of natural selection, preferable genes are favored by nature in the gene pool, and ..

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Biological Viruses

Viruses possess both living and non-living characteristics. This unique feature distinguishes them from other organisms...

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Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..