Approximately $49 \%$ of the dry weight of organisms is composed of carbon. (in $\%$)

Vertical distribution of different species occupying different levels is called..........

During ecological succession,

Distinguish between gaseous and sedimentary cycles.
$I-$ Sulfur cycle
$II -$ Nitrogen cycle
$III -$ Carbon cycle
$IV -$ Phosphorus cycle
Identify the correct grouping for (Gaseous cycle,Sedimentary cycle).

In biogeochemical cycles,chemicals pass through

In hydrarch succession,the reed swamp stage comes immediately after . . . . . . .