Which of the following represents the largest man-made ecosystem?

Identify the main decomposers of an ecosystem.

Give differences: Grazing food chain and Detritus food chain.

Phosphorus cycles in the form of

Which of the following is the logical sequence of primary succession in rocks?

$A$: Stratification helps in the accommodation of a large number and types of plants in the same area.
$R$: It is the occurrence of horizontal zonation in the ecosystem.