Which of the following are not primary producers in an aquatic ecosystem?

  • A
    Phytoplankton
  • B
    Algae
  • C
    Higher plants
  • D
    None

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Similar Questions

Match the following columns:
Column-$I$ Column-$II$
$(i)$ Ecosystem $(P)$ Bacteria,Fungi
$(ii)$ Food chain $(Q)$ Nutrient cycling
$(iii)$ Birds $(R)$ Primary consumer
$(iv)$ Decomposers $(S)$ Deer

If plants (producers) of an ecosystem die,then the system

Which of the following statements regarding food chains are considered correct?
$(1)$ Removal of $80\%$ of tigers from an area results in greatly increased growth of vegetation.
$(2)$ Removal of most carnivores results in an increased population of deer.
$(3)$ The length of food chains is generally limited to $3-4$ trophic levels due to energy loss.
$(4)$ The length of food chains can vary from $2$ to $8$ trophic levels.

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

Which cycle is represented by the given figure?

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