AP BIOLOGY

Detailed explanation-1: -A species is classified as endangered when its population has declined at least 70 percent and the cause of the decline is known. A species is also classified as endangered when its population has declined at least 50 percent and the cause of the decline is not known.

Detailed explanation-2: -An endangered species is any species that is at risk of extinction because of a rapid decrease in its population or a loss of its critical habitat.

Detailed explanation-3: -“Threatened” means a species is likely to become endangered within the foreseeable future. States have their own ESA-type laws, so species can have different Threatened/Endangered statuses at the federal and state levels.

Detailed explanation-4: -Endangered (EN): A species considered to be facing a very high risk of extinction in the wild. Vulnerable (VU): A species considered to be facing a high risk of extinction in the wild.

Detailed explanation-5: -Endangered species are those plants and animals that have become so rare they are in danger of becoming extinct. Threatened species are plants and animals that are likely to become endangered within the foreseeable future throughout all or a significant portion of its range.