Question

when does intramembranous ossification begin? a during fetal development b in adolescence c in adulthood d in old age

Explanation:

Intramembranous ossification is one of the two main forms of bone formation. It begins during fetal development. Bones such as the flat bones of the skull are formed through this process. Adolescence, adulthood, and old age are much later stages in life compared to when this ossification process starts.

Answer:

A. during fetal development