SSC Ecology And Environment Sample Paper NCERT Sample Paper-5

  • question_answer
    'Forest that never bums' is

    A)  Coniferous

    B)  deciduous

    C)  Tundra

    D)  tropical rain forests

    Correct Answer: A

    Solution :

    [a] The conifers in the temperate forests are mostly pines. Pine trees depend on fire in order to grow in areas which would otherwise be taken over by oaks. Pines have thick bark which does not bum easily, protecting the wood underneath. The buds on their stems are surrounded by thick clumps of needles which do burn, but at a low temperature which does not damage the bud. The broad-leaved oak trees don't have these defences, and will be killed even in a small fire. This means that in areas with frequent, relatively small fires, the oaks never have time to grow large enough to take over from the pines. Some pines even require fire to release the seeds in their cones.

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