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 light is transmitted by water?

Which of the following statements is false?

Amount of inorganic substances present in an ecosystem is . . . . . . Energy flow is a . . . . . . feature of ecosystem.

Which of the following are the essential sources for releasing $CO_{2}$ into the atmosphere?
$I.$ Burning of wood
$II.$ Volcanic activity
$III.$ Combustion of organic matter
$IV.$ Fossil fuels
Choose the correct option.

$A$: Decomposers are excluded from the food chains.
$R$: They act on all trophic levels of a food chain.

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