Final answer:
Nonpathogenic microorganisms are microbes that do not cause diseases, and some examples include Lactobacillus species used in food fermentation, Bacillus subtilis for plant health, and nitrogen-fixing bacteria that aid in soil fertility.
Step-by-step explanation:
Nonpathogenic microorganisms are microbes that do not cause disease in healthy hosts and generally pose minimal risk to humans, animals, plants, and the environment. Many of these microorganisms are, in fact, beneficial and play a vital role in various ecosystems, including those within the human body.
Examples of Nonpathogenic Microorganisms:
- Lactobacillus species - commonly used in the production of yogurt and other fermented products and contribute to the health of the gut microbiota.
- Bacillus subtilis - utilized in controlling plant pathogens and promoting plant growth and health.
- Nitrogen-fixing bacteria - such as Rhizobium and Azotobacter species, which convert atmospheric nitrogen into a form that plants can use, thereby aiding in soil fertility.
These nonpathogenic microorganisms significantly contribute to various industries, including agriculture, food, and medicine, while also maintaining ecological balance and supporting life on Earth.