The roles of microorganisms as parasites and pathogens that cause infection and disease. Introduction: Of the great diversity of microorganisms found in different habitats on Earth, a large majority is harmless to human beings. Microorganisms emerged on Earth much before humans and they are free-living organisms capable of surviving without humans. Many microorganisms are beneficial to humans and for the environment. However, some microorganisms have adapted to non-free-living life cycles and they cause problems for humans, plants and animals.

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Chapter 1.4, Problem 7ELO

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To determine:

The roles of microorganisms as parasites and pathogens that cause infection and disease.

Introduction:

Of the great diversity of microorganisms found in different habitats on Earth, a large majority is harmless to human beings. Microorganisms emerged on Earth much before humans and they are free-living organisms capable of surviving without humans. Many microorganisms are beneficial to humans and for the environment. However, some microorganisms have adapted to non-free-living life cycles and they cause problems for humans, plants and animals.

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