Sun is the only source of energy for all ecosystems on the earth $EXCEPT$ for . . . . . . .

  • A
    deep forest ecosystem
  • B
    deep sea ecosystem
  • C
    polar region ecosystem
  • D
    xeric ecosystem

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Among the ecosystem services are control of floods and soil erosion. How is this achieved by the biotic components of the ecosystem?

Initial seral stages in ecological succession:

$A$ pond can be classified under which type of ecosystem?

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