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Q32 (IAS/2026) Environment & Ecology › Biodiversity & Protected Areas Official Key

With respect to the Western Hoolock Gibbons, which of the following statements is/are correct?
1. A Sanctuary in North-east India is home to this ape species listed as Endangered in the International Union for Conservation of Nature (IUCN) Red List.
2. They have specialized brachiation and can easily swing between trees.
3. They possess a strong and heavy build like gorillas, yet are remarkably agile tree climbers.
Select the answer using the code given below:

Result
Your answer: —  ·  Correct: B

Explanation

Statement 1 is correct: The Western Hoolock Gibbon (Hoolock hoolock) is listed as Endangered on the IUCN Red List. The Hoollongapar Gibbon Sanctuary in Assam, North-east India, is specifically dedicated to the conservation of this ape species.

Statement 2 is correct: Gibbons are highly adapted to an arboreal lifestyle. They possess a specialized mode of locomotion called brachiation, which allows them to swing effortlessly from branch to branch using their exceptionally long arms.

Statement 3 is incorrect: Gibbons are classified as "lesser apes." Unlike great apes such as gorillas, which possess a strong, heavy, and robust build, gibbons have a slender and lightweight body structure perfectly suited for canopy living and agile movement.

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