Q.Which one of the following is not a major characteristic feature of biodiversity hot spots?

A biodiversity hotspot is defined by two criteria: very high species richness together with a high degree of endemism (species found nowhere else), and severe, accelerated habitat loss. These regions are conservation priorities precisely because they pack extraordinary species richness and high endemism into small, threatened areas.

The major features that characterize hotspots are:

• Large number of species – they are centres of exceptional diversity.

• Abundance of endemic species – species found nowhere else on Earth concentrate here.

• Mostly located in the tropics – tropical and subtropical regions, with their stable climates and complex habitats, harbour the vast majority of hotspots (examples include the Western Ghats, Madagascar, and the Atlantic Forest). …

The concept of biodiversity hotspots was introduced to identify regions of exceptional conservation priority. These are areas that face significant threat but harbor extraordinary concentrations of life, particularly species found nowhere else on Earth. Understanding what makes a hotspot requires looking at both biological richness and geographic patterns.

A biodiversity hotspot must satisfy two criteria: very high species richness together with a high degree of endemism (species confined to that region and found nowhere else), and it must also be a region undergoing accelerated habitat loss. These twin requirements of irreplaceability and threat define the hotspot framework.

The major characteristics that emerge from these criteria are clear:

• High species richness: Hotspots pack an enormous number of species into relatively small areas. They are biodiversity treasure houses, often containing a disproportionate share of global species diversity.

• Abundance of endemic species: This is the defining biological feature. Endemism means these species are unique to the hotspot — lose the habitat, and you lose the species forever. No other place on Earth can serve as a refuge.

• Tropical concentration: The vast majority of the world's biodiversity hotspots lie in tropical and subtropical regions. The Western Ghats and Sri Lanka, the Eastern Himalayas, the Indo-Burma region, and Sundaland are all tropical or near-tropical. Warm, stable climates and high productivity over evolutionary time have allowed tropical regions to accumulate and maintain extraordinary diversity. …

Test each option against the two formal criteria that define a hotspot — high endemism and high species richness, concentrated overwhelmingly in warm, stable, productive tropical/subtropical zones — and note that options (a)-(c) all follow directly from that definition, while polar regions are the ecological opposite (l …