Question

If there is no microorganisms what would happen?

Answer 1

microorganism is the bacteria,fungi and etc. but it involve in the multipilicatipn of cells in body

Answer 2

Microorganisms, mainly bacteria in the ocean, are responsible for the oxygen in the air. Trees and so on use up the oxygen they produce in their own respiration - “breathing". The photosynthetic bacteria in the ocean do not use up all they produce, because huge numbers are buried in sediments when they die. So, contrary to popular belief, plants are not responsible for the high oxygen level of the atmosphere: microorganisms are.