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. In adolescence, adulthood, and old age, bone remodeling and growth (if any) occur but the initial process of intramembranous ossification starts much earlier.

Answer:

A. during fetal development