Railways R.R.C. (Delhi) Solved Paper Held on 1st Shift 2-11-2014

  • question_answer
    The greatest threat to the world's coral reef systems emanates from?

    A) More frequent coral bleaching

    B) UV light band

    C) Starvation caused by decline in Zoo-plankton

    D) Cyanide fishing

    Correct Answer: A

    Solution :

    Threats to coral reefs can be also classifies as either local or global: local threats include overfishing, destructive fishing practices, nutrient runoff, sedimentation, and coral disease while global threats include mass coral bleaching produced by rising sea surface temperature (worsened by climate change), and ocean acidification.             


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