An ecosystem must have continuous external source of

  • A

    Food

  • B

    Minerals

  • C

    Energy

  • D

    All of the above

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Primary producer of an ecosystem is

Energy storage at consumer level is called

Which of the following statement is not correct about energy flow in an ecosystem?

In an ecosystem, the population of

  • [AIPMT 1988]

How many sentence are correct?

$(1)$ The trophic levels in $GFC$ are unlimited

$(2)$ Organisms at each trophic level depend on those at the higher trophic level for their energy demands.

$(3)$ Plants capture only $2 -10$ percent of $PAR$.

$(4)$ All organisms are dependent for their food on producers, either directly or indirectly.