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Identify the correct statements about exotic rivers.

  1. They originate in rainy areas beyond the desert's margins.
  2. The Nile in Egypt is an example of an exotic river.
  3. They are dry except during the rainy season.
  4. Their water source is typically within the desert itself.

    Ai, ii

    Bi only

    Cii only

    Div only

    Answer:

    A. i, ii

    Read Explanation:

    • The vegetated area around it is known as A permanent source of water in a desert and Oasis

    • An exotic river has its source in a rainy area beyond the margins of the desert

    • Examples of exotic rivers are

    • - The Nile in Egypt, The Tigris and the Euphrates in Iraq, The Indus in Pakistan and The Colorado in the USA

    • Channels that are dry except during the rainy season are called wadis in Arabic-speaking countries.

    • Although the surface of the channel is dry, water is present underground and can be obtained using wells; in some regions, natural springs also supply water.

    • As in the case of exotic rivers, the source of water in natural springs too lies outside the desert.


    Related Questions:

    Regarding nutrient cycling, which of the following statements is/are correct?

    1. Nutrient cycling involves the entry of nutrients into ecosystems.
    2. Internal transfers of nutrients between plants and soils are part of nutrient cycling.
    3. Loss of nutrients from ecosystems is not considered a component of nutrient cycling.

      Which of the following are permanent sources of water in a desert?

      1. Oasis
      2. Wadis
      3. Exotic rivers
      4. Artesian wells

        Which of the following statements accurately describe the historical development and characteristics of urban centers in desert regions?

        1. Cities in desert regions of Asia and Africa primarily emerged in the central, most arid parts of the deserts.
        2. Ancient cities like Cairo, Damascus, and Baghdad were significant hubs for administration, learning, faith, trade, and transit.
        3. The discovery of oil wealth in West Asia and North Africa has had no impact on the creation or modernization of cities in these areas.
        4. Mecca and Medina are recognized as the holiest cities within the Islamic faith.

          ആവാസവ്യവസ്ഥയുമായി ബന്ധപ്പെട്ട ശരിയായ പ്രസ്താവനകൾ ഏതാണ് ?

          i) ഒരു ആവാസവ്യവസ്ഥയിൽ ജീവീയഘടകങ്ങളും അജീവീയഘടകങ്ങളും ഉൾപ്പെടുന്നു.

          ii) ജീവികളും അവയുടെ ചുറ്റുപാടും തമ്മിലുള്ള പരസ്പരബന്ധത്തെ കുറിച്ചുള്ള പഠനമാണ് ആവാസവ്യവസ്ഥ.

          iii) ഒരു ജീവി ജീവിക്കുന്ന പ്രകൃതിദത്തമായ ചുറ്റുപാടിനെ ആവാസം എന്നുപറയുന്നു.

          iv) ഒരു ആവാസവ്യവസ്ഥയിലെ ഭക്ഷ്യശൃംഖലയിൽ ആദ്യത്തെ കണ്ണി എപ്പോഴും മാംസഭോജിയായിരിക്കും.

          Nitrogen-fixing bacteria like Rhizobium are associated primarily with which part of the nitrogen cycle?