Q.

Which one of the following organisms bears hollow and pneumatic long bones              [2021]

1 Ornithorhynchus  
2 Neophron  
3 Hemidactylus  
4 Macropus  

Ans.

(2)

Endoskeleton of Neophron (vulture) that belongs to Class Aves is fully ossified (bony) and bears hollow and pneumatic long bones.