AP BIOLOGY

Detailed explanation-1: -Extinction is defined as the end of an organism or of a group of organisms, normally a species. The moment of extinction is considered when the last individual of the species die, although their capacity to breed and recover may have been lost much before this point.

Detailed explanation-2: -Extinction occurs when all members of a species are dead. This moment is typically marked by the death of the last individual of a species. There have been a series of mass extinctions in Earth’s history.

Detailed explanation-3: -A species is considered extinct when the last of its kind dies. In many cases, we decide that this has happened only years after the event, with reference to the fossil record. Sometimes a species might not be technically extinct, but its population is small enough to be unviable.