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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The following diagram shows the phosphorus cycle. Identify the producers in it.

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

Which of the following statements are correct?
$(a)$ Energy flow from producers to consumers is unidirectional
$(b)$ Energy pyramid can never be inverted
$(c)$ Transfer of energy follows the $10\%$ law
Choose the correct answer from the options given below:

Consider the following statements about food chain:
$I.$ The transfer of energy from producers to top consumers through a series of organisms is called a food chain.
$II.$ $A$ food chain is always straight and proceeds in a progressive straight line.
$III.$ In a food chain,there is a unidirectional flow of energy from the sun to producers and subsequently to a series of different types of consumers.
Which of the statements given above are correct?

Crystalline rocks are a natural source of which biogenetic element?

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