Bacteria have many roles on earth

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make some types of food for humans

pathogens

mutualist like the large intestine of humans making vitamin k

fix atmospheric nitrogen and soil for use in plants

winning dancing with the stars

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Explanation: Bacteria performs many roles on this planet.

Some bacteria makes food for ourselves such as yogurt and bakery products. Some bacteria live in our in body and make some useful vitamins for our body and help in digestion. There are many bacteria that lives in the root of some higher trees and fix atmospheric nitrogen for the plant. Some species of bacteria causes various diseases in human, animals and plants.

rocks and weathering-matching