Answer :
Final answer:
Microorganisms that live on fleas, lice, ticks, and mites include types like Rickettsias and mites from the genus Demodex. Rickettsias are obligate intracellular parasites, while Demodex mites consume skin lipids in a symbiotic relationship with humans. These microbes play essential roles in both ecosystems and human industry.
Explanation:
Microorganisms, or microbes, are living organisms too small to be seen without a microscope. On small arthropods like fleas, lice, ticks, and mites, microbes carry out a variety of functions. For instance, Rickettsias are a type of bacterium that are obligate intracellular parasites; meaning they only grow and reproduce within the living cells of their hosts, including arthropods such as ticks, mites, lice, and fleas. Furthermore, mites from the genus Demodex are known to live on humans, where they have a symbiotic relationship by consuming lipids produced in sebaceous regions of our skin.
These microorganisms are crucial to the planet's ecosystem and play a large role in the evolution and health of our environment. They are also used substantially in fermented foods like beer, bread, cheese, and wine, reflecting their importance in human culture and history.
