Which of the following characteristics is NOT of Aves?

Question

Accepted Answer

Step-by-step analysis:

1. Statement (1): "They have four-chambered heart." — Correct. Birds have a $4$-chambered heart, separating oxygenated and deoxygenated blood.

2. Statement (2): "They give birth to live young ones with some exceptions those lay eggs." — Incorrect for Aves. Birds are oviparous (they lay eggs); there are no true viviparous (live-bearing) birds. Thus this statement is NOT characteristic of Aves.

3. Statement (3): "These are warm-blooded animals." — Correct. Birds are endothermic (warm-blooded).

4. Statement (4): "They breathe through the lungs" — Correct. Birds respire using lungs (with a specialized air sac system).

Conclusion: Only statement (2) is NOT a characteristic of Aves, so the correct option is b.

FINAL_ANSWER: b

Answer

Answer

Answer