Question

in the absence of microorganisms the earth would become a heap of Dead plant and animal justify this statement

Answer 1

this is because if microorganisms are not there , the dead remains of plants and animals will not be able to break down by action of microorganisms or decompose .Hence, earth would become the heap of dead plants and animals

Answer 2

this is because the microorganisms are the decomposes of the dead and decayed waste materials present on the earth
if they were not present on the earth then all the dead and decayed materials will lie on the way earth just like waste
this will cause to spread of bad smell and many harmful diseases which can spread from the dead material

therefore these are very essential in earth for the completion of ecosystem


hope you have understood this answer