Which of the following is $NOT$ a functional unit of an ecosystem?

  • A
    Energy flow
  • B
    Decomposition
  • C
    Productivity
  • D
    Stratification

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Which of the following statements is true for an ecosystem?

The primary succession in a sere is

Identify $Z$ in the given figure representing the carbon cycle.

Select the incorrect match.
$I.$ Sedimentary nutrient cycle-Nitrogen cycle
$II.$ Pioneer species-Lichens
$III.$ Secondary succession-Burned forests
$IV.$ Pyramid of biomass in sea-Upright

Omnivores feed on members of which trophic levels?

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