Which of the following characteristics is NOT of Aves?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. They give birth to live young ones with some exceptions those lay eggs.
The characteristic that is NOT of Aves is that they give birth to live young ones with some exceptions; those that lay eggs. Aves, or birds, primarily reproduce by laying eggs, which is a defining feature of the class. They have four-chambered hearts, are warm-blooded, and breathe through lungs. These adaptations help birds maintain high metabolic rates necessary for flight and other activities. Therefore, the statement regarding giving birth to live young is incorrect in the context of Aves.