Question

The term used for species in which the last individual has died or is not recorded is

• A. Extinct
• B. Near threatened
• C. Endangered
• D. Vulnerable

Hint:

{Important IUCN Red List categories (simplified order):}

• Least Concern (LC)
• Near Threatened (NT)
• Vulnerable (VU)
• Endangered (EN)
• Critically Endangered (CR)
• Extinct in the Wild (EW)
• Extinct (EX)

If a species survives only in zoos or captivity and not in its natural habitat, it is classified as {Extinct in the Wild (EW)}.

Answer 1

The Correct Option is A

Concept:
The International Union for Conservation of Nature (IUCN) classifies species into different categories according to their risk of extinction. These categories are published in the IUCN Red List, which serves as a global inventory of the conservation status of plant and animal species. The classification helps scientists and conservationists determine the level of threat faced by species and prioritize conservation measures.
Step 1: Understanding the category ``Extinct''.
A species is considered Extinct (EX) when there is no reasonable doubt that the last individual of that species has died. This conclusion is usually made after:

• Extensive surveys in the species' known habitats
• Searches conducted at appropriate times of day and year
• Long periods without any confirmed sightings

Once these investigations fail to find any surviving individuals, the species is declared extinct.
Step 2: Other important IUCN conservation categories.

• Endangered (EN): Species facing a very high risk of extinction in the near future.
• Vulnerable (VU): Species facing a high risk of extinction in the medium-term future.
• Near Threatened (NT): Species that are close to qualifying for a threatened category.

These categories indicate different levels of conservation concern but still imply that the species exists in the wild.
Step 3: Identifying the correct category.
Since the question refers to a species whose last individual has died, the correct classification according to the IUCN Red List is: \[ Extinct (EX) \] Final Answer: \(\boxed{\text{Extinct}}\)