Question

Ornithischia contains
A) Aquatic reptiles
B) Reptile hipped dinosaurs
C) Bird hipped dinosaurs
D) Wingless birds

Answer 1

Hint: They have bird-like structure in the hip-bone but the birds evolve from saurischians,”lizard-hipped’.

Complete answer:
First we should know about Ornithischia to answer this question. As far as it is understood, the Ornithischia were mostly plant eaters. They share a variety of other unusual characteristics in addition to a typical pelvic structure, including a bone that connects the two lower jaws and prominent leaf-shaped teeth that crenulate the upper edges. Generally, the sister group of Saurischia is named Ornithischia.
Now, let us find the solution from the options-
- Ornithischia is a species of beaked dinosaurs, which are herbivorous.
- Because of their hip form, they are known as the 'bird-hipped' dinosaurs.
- In reality, however, birds originated from the 'lizard-hipped' dinosaurs, the Saurischia.
- The word "Ornithischia" means "bird-hipped," and also pelvises are found in birds where the pubis points backward.
From these we came to know that Ornithischia are said as bird hipped dinosaurs, it is not considered as Aquatic reptiles because it is a terrestrial species, reptile hipped dinosaur as it has a bird-like hip structure and wingless bird because birds are evolved from the "lizard-hipped" saurischians. Therefore, the options A. B, and D are incorrect,

Thus, the correct answer is option (C) Bird hipped dinosaurs.

Note:Harry Seeley established the two-order method of classification for dinosaurs in 1887. Based on the bird-like structure of the hip bones of the dinosaurs, the Ornithischia division was formed. Modern-day birds did not form and adapt from ornithischians, despite this resemblance. The ornithischian hip bone differs from the saurischian version in that, parallel to the ischium, the pubis bone points backward and downward, facing the tail.