In an ecosystem
Cycling of energy and nutrients is a coupled process
Cycling of energy is an independent process
Movement of energy is unidirectional
Macro and micronutrients cycle at the same pace
Assertion : Biotic community has higher position than population in ecological hierarchy.
Reason : Population of similar individuals remains isolated in the community.
The zooplanktonic forms are
$A$ : 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 is a primary consumerin maize field ecosystem ?