Q. Consider the following pairs regarding Biogeographic Zones of India:
No.Biogeographic ZoneDescription
1.Trans-HimalayasCovers high-altitude cold desert in Ladakh & Lahaul-Spiti
2.HimalayasCovers the entire Himalayan chain from NW to NE India
3.DesertCovers arid region west of Aravalli includes salty desert of Gujarat & sand desert of Rajasthan .
4.Semi-aridCovers coastal region along western coastline
Which of the above pairs is/are correctly matched?

[A] 1 and 2 only

[B] 1, 2 and 3 only

[C] 2 and 4 only

[D] All four

Answer: A
Notes:

Explanation:

  • Trans-Himalayas-
    • This zone is an extension of the Tibetan plateau, covering Ladakh (J&K) and Lahaul-Spiti (Himachal Pradesh).
    • Characterised by high-altitude cold deserts, sparse vegetation, and unique fauna like the snow leopard and Tibetan wild ass.
  • Himalayas
    • Includes the entire Himalayan mountain chain, stretching from the north-west to the north-east.
    • Contains diverse biotic provinces such as temperate forests, alpine meadows, and snow-covered peaks.
  • Desert– It refers to the extremely arid area west of the Aravalli hills, which includes:
    • The salty desert of Gujarat (Rann of Kutch)
    • The sand desert of Rajasthan (Thar Desert)
  • Semi-arid
    • The Semi-arid zone lies between the desert and the Deccan plateau, including the Aravalli hill range.
    • Vegetation is mostly thorn forests and scrublands.
  • Source: Environment (N.C.E.R.T)
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