Which of the following is not true regarding an ecosystem?

  • A
    Self-sufficient unit
  • B
    Cyclic exchange of materials between living beings and the environment
  • C
    Only requirement is input of energy
  • D
    Characterized by a major vegetation type

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What is the natural reservoir of phosphorus?

Choose the correct identification for the given stage of succession and the stage by which it is followed,respectively.

Match the ecological terms given in Column $I$ with its correct explanation in Column $II$.
Column $I$ (Terms)Column $II$ (Explanation)
$1$. Stratification$a$. Horizontal distribution of different species
$2$. Zonation$b$. Rate of generation of Biomass in an ecosystem
$3$. Productivity$c$. Breakdown of detritus
$4$. Decomposition$d$. Vertical distribution of different species
Choose the correct option.

Study the diagram carefully and fill in the blanks. Choose the correct option for $A, B, C, D$ and $E$.

Choose the ecosystem services.

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