When is a Species is Considered to Be Critically Endangered

Question

When is a species is considered to be critically endangered?
A) If there is a 50% probability of extinction in 5 years or 2 generations, whichever is longer
B) If there is a 50% probability of extinction in 10 years or 3 generations, whichever is longer
C) If there is a 20% probability of extinction in 20 years or 3 generations, whichever is longer
D) If there is a 20% probability of extinction in 20 years or 5 generations, whichever is longer

Accepted Answer

According to the International Union for Conservation of Nature (IUCN), a species is considered to be critically endangered if there is a 50% probability of extinction in 10 years or 3 generations, whichever is longer. This is based on scientific evidence and population trends, and indicates a very high risk of extinction in the near future.