Which statement about endemism is true?

Which statement about endemism is true?

• A. Endemic species are found in most regions of the world.
• B. Endemic means native to a restricted geographic area and not found elsewhere.
• C. Endemic species have large populations.
• D. Endemic status indicates the species is not under threat.

Answer: (B)

Endemism describes a species being native to a restricted geographic area and not found elsewhere. That means the species is tied to a specific place, like a particular island, mountain region, or habitat, and it doesn’t occur in other parts of the world. This restricted distribution can arise from historical isolation, specialized habitat needs, or limited dispersal. This idea is why the statement claiming endemism means being native to a restricted area and not found elsewhere is the best description. It captures the essence of endemism without making assumptions about how common the species is or its conservation status. Keep in mind that being endemic doesn’t guarantee a large population or safety from extinction. Endemic species can be rare or abundant within their small range, and many endemics are threatened precisely because their limited distribution makes them vulnerable to habitat loss, climate change, or other pressures. Conversely, an endemic species could be doing well in a protected area, but the core concept of endemism is about where the species occurs, not how abundant it is or its threat level. The other statements don’t fit because they describe broad distribution, assume large populations, or imply no threat, none of which define endemism.

Endemism describes a species being native to a restricted geographic area and not found elsewhere. That means the species is tied to a specific place, like a particular island, mountain region, or habitat, and it doesn’t occur in other parts of the world. This restricted distribution can arise from historical isolation, specialized habitat needs, or limited dispersal.

This idea is why the statement claiming endemism means being native to a restricted area and not found elsewhere is the best description. It captures the essence of endemism without making assumptions about how common the species is or its conservation status.

Keep in mind that being endemic doesn’t guarantee a large population or safety from extinction. Endemic species can be rare or abundant within their small range, and many endemics are threatened precisely because their limited distribution makes them vulnerable to habitat loss, climate change, or other pressures. Conversely, an endemic species could be doing well in a protected area, but the core concept of endemism is about where the species occurs, not how abundant it is or its threat level.

The other statements don’t fit because they describe broad distribution, assume large populations, or imply no threat, none of which define endemism.