Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: Figure 7.33 Newborn Skull The bones of the newborn skull are not fully ossified and are separated by large areas called fontanelles, which are filled with fibrous connective tissue. The fontanelles allow for continued growth of the skull after birth. At the time of birth, the facial bones are small and underdeveloped, and the mastoid process has not yet formed. Answer: fontanelles
The bones of the newborn skull are not fully ossified and are separated by large areas called what?