Select the incorrect statement from the following.

  • A
    In a terrestrial ecosystem,much more energy flows through the grazing food chain than through the detritus food chain.
  • B
    The detritus food chain may be connected to the grazing food chain at some levels.
  • C
    Animals like cockroaches,crows,and humans are omnivores.
  • D
    The natural interconnection of food chains forms a food web.

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Which of the following represents a tertiary consumer and a secondary consumer,respectively?

$X-$ Atmospheric input of phosphorus through rainfall is much smaller than carbon input.
$Y-$ The exchange of phosphorus between organisms and the environment is negligible.

Phosphorus of the ocean becomes available to land plants due to:

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.

Ecological succession is a

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