33. In birds, some of the vertebrae are fused to form A.Keel B.Furcula C.Syncytium D.Synsacrum
Answer: Option D Solution: Some posterior thoracic vertebrae, the lumbar, sacral and a few anterior caudal vertebrae are fused to form a complex bone called synsacrum. The innominate bones are fused with the synsacrum to a greater or lesser extent, according to species, forming an avian pelvis.
