Question

The species confined to a particular region and not found anywhere else is:

• A. Cosmopolitan
• B. Endemism
• C. Hot-spot
• D. Alien species

Hint:

Important ecological terms:
$\bullet$ Endemic: Found only in one specific geographical region.
$\bullet$ Cosmopolitan: Found across the globe.
$\bullet$ Biodiversity Hotspot: Region with high species richness and high endemism.

Answer 1

The Correct Option is B

Concept:
Biogeographical distribution patterns describe how biological taxa are geographically distributed across different habitats, regions, and continents.

Step 1: Defining Endemism:
Endemism is the ecological and geographical state where a biological species is strictly restricted to a unique, defined geographical location (such as an island, mountain range, or specific biome) and does not occur naturally anywhere else in the world.
Such organisms are termed endemic species (e.g., the Western Ghats lion-tailed macaque, kangaroo in Australia).

Step 2: Evaluating the Alternative Ecological Terms:
- Cosmopolitan: Refers to species that have a nearly worldwide distribution and can thrive in diverse biomes across multiple continents (e.g., pigeons, houseflies).
- Hot-spot: A biodiversity hotspot is a biogeographical region characterized by exceptional levels of species richness and a high degree of endemism, while concurrently facing extreme habitat destruction.
- Alien species: Non-native or exotic species that have been introduced into an ecosystem outside their natural historical range, either intentionally or accidentally.

Step 3: Conclusion and Final Selection:
The phenomenon of being confined exclusively to a particular geographic zone is designated as Endemism.