Which of the following in an ecosystem exhibits one-way flow rather than cyclic flow
Potassium
Carbon
Free energy
Nitrogen
$A$ : Detrivores and decomposers hold up a part of nutrients contained in detritus.
$R$ : Immobilised nutrients cannot be available for solubilisation after the death of saprotrophs.
$A$ : Detritus food chain begins with detritus.
$R$ : Detrivores like fungi and bacteria are major decomposers in such food chains.
With regard to ecological food chain, man is a
Flow of energy declines from low to higher trophic level in ecosystem, is mainly explained by
The $10\; \%$ law is related to