Symbiosis, Introduction to

Symbiosis is the persistent association of two or more dissimilar species. This phenomenon is widespread in nature and has contributed to major transitions in the evolution of life on Earth. Symbiosis can serve as a source of evolutionary innovation. Diverse plant and animal species harbor microbial symbionts that aid their hosts in resource acquisition and defense. Symbioses can originate from diverse interaction types, and can be maintained or broken down through a variety of mechanisms. Understanding and manipulating symbioses may provide direct benefits to human health and agricultural systems.

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