Answer: Aves.
- A Reptilia
- B Aves
- C Mammalia
- D Amphibia
Correct answer: B. Aves
Explanation: Class Aves (birds) is uniquely characterized by the presence of feathers and forelimbs modified into wings.
Moving across the animal phyla, body organisation becomes progressively more complex: from no symmetry and cellular organisation (Porifera) through radial/diploblastic (Cnidaria), bilateral/acoelomate (Platyhelminthes), pseudocoelomate (Nematoda), to a true coelom with full organ systems (Annelida and beyond).
Concept context
Phylum-level classification of the animal kingdom from Porifera to Chordata, based on body symmetry, coelom, and segmentation. One of the most example-heavy chapters for NEET.