GENERAL KNOWLEDGE

Detailed explanation-1: -Complete answer: Mammals have the highest that is, 177 endangered species among vertebrates which represents 3.8% of all the species.

Detailed explanation-2: -“Today, amphibians enjoy the dubious distinction of being the worlds’ most endangered class of animals; it’s been calculated that the group’s extinction rate could be as much a forty-five thousand times higher than the background rate. But extinction rates among many other groups are approaching amphibian levels.

Detailed explanation-3: -Explanation: Mammals have 177 endangered species which represents 3.8% of all the species and become a group of vertebrates comprises the highest number of endangered species.

Detailed explanation-4: -Although the living reptiles birds are most closely related to are crocodilians (archosaurs), when it comes to their relation to dinosaurs, birds evolved from theropod dinosaurs. These theropods share over 100 traits with modern birds.