SSC Ecology And Environment Sample Paper NCERT Sample Paper-1

  • question_answer
    A biome characterized by hot summer, warm winter and treeless vegetation is

    A) Tropical deserts

    B) steppe grasslands

    C) Savannah grassland

    D) temperate desert.

    Correct Answer: D

    Solution :

    Hot desert climates are typically found under the subtropical ridge where there is largely unbroken sunshine for the whole year due to the stable descending air and high pressure aloft. During colder periods of the year, night- time temperatures can drop to freezing or below due to the exceptional radiation loss under the clear skies. However, very rarely do temperatures drop far below freezing. Cold desert climates can feature hot (sometimes exceptionally hot) and dry summers, though summers typically are not quite as hot as summers in hot desert climates. Unlike hot desert climates, cold desert climates usually feature cold, sometimes brutally cold, dry winters with temperatures far below the freezing point. A cold desert climate is typically found in temperate zones, almost always in the rain shadow of high mountains which restrict precipitation from the westerly winds, or in the case of Central Asia, from the monsoon. In physical geography, a steppe is an ecoregion, in the montane grasslands and shrub lands and temperate grasslands, savannas, and shrub land biomes, characterized by grassland plains without trees apart from those near rivers and lakes. A savanna or savannah is a grassland ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of grasses.

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