Which of the following habitats is most unsuitable for primary productivity
Meadow
Forested river bank
Cave
Pond
$A$ : 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.
Which of the following in an ecosystem exhibits one-way flow rather than cyclic flow
The trophic level of mushroom and Monotropa is
Whale is
The $10\; \%$ law is related to