Answer:
Organisms
which breakdown the complex organic compounds present in dead and decaying
matter are called decomposers, e.g., certain bacteria and fungi.
Decomposers acts as cleaning agents of environment by decomposing the
dead bodies of plants and animals. They also help in recycling of materials, replenishment
of soil's nutrients etc.
The consequence of their absence in an ecosystem can be
disastrous as discussed below
(i) The dead bodies would keep lying, it would lead to
their accumulation and thus, polluting the environment.
(ii) The elements by which bodies are made would never be
returned to the environments.
As a result, all the nutrients present in soil, air and
water would soon be exhausted and the whole life cycle of organisms will be
disrupted.
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