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Biodiversity, Conservation and Environmental Issues — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYBiodiversity, Conservation and Environmental Issues1 Mark
MCQ
When is the serious threat developed to an ecosystem ?
  • A
    When any one or two species become extinct.
  • ✓
    When key species that drive ecosystem become extinct.
  • C
    When native species are replaced by exotic species.
  • D
    When human beings take conservation measures.
✓

Answer

Correct option: B.
When key species that drive ecosystem become extinct.
When key species that drive ecosystem become extinct.

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