NEET BIOLOGY

Detailed explanation-1: -It divides species into nine categories: Not Evaluated, Data Deficient, Least Concern, Near Threatened, Vulnerable, Endangered, Critically Endangered, Extinct in the Wild and Extinct.

Detailed explanation-2: -The Cretaceous–Paleogene (K–Pg) extinction event (also known as the Cretaceous–Tertiary (K–T) extinction) was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago.

Detailed explanation-3: -With the discovery of many new species since the 1840s, the Dinosauria now contains two major groups of dinosaurs: the Ornithischia, or “bird-hipped” dinosaurs, and the Saurischia, or “lizard-hipped” dinosaurs.

Detailed explanation-4: -The dinosaurs became extinct due to natural calamities. It mainly occurred due to the falling of asteroid from the sky leading to the entire race of dinosaurs to be wiped out from earth.