Which ecosystem has the maximum biomass?

Climax vegetation of a region is generally

An ecosystem is a complex interacting system of

Choose the correct statement regarding trophic levels in an ecosystem.

Which of the following is an abiotic component of an ecosystem?

Distinguish between primary succession and secondary succession based on the following examples:
$I-$ Abandoned farmland
$II-$ Burned or cut forests
$III-$ Newly cooled lava
$IV -$ Bare rock
$V -$ Flooded lands
$VI -$ Newly created pond or reservoir
Identify the correct grouping for primary succession and secondary succession respectively.