Question

question
which statement concerning endochondral ossification is the most accurate?
answer
the ends of the cartilage rod are converted into bone first.
a bone collar forms around the ends of the cartilage rod.
a primary ossification center begins replacing cartilage in the central region of the cartilage rod.
the epiphyseal plate is an area of bone that joins the shaft of the cartilage rod to the ends of the rod.
i dont know yet

Explanation:

In endochondral ossification, a primary ossification center forms in the central region of the cartilage rod and begins replacing cartilage with bone. The ends of the cartilage rod are not converted to bone first. A bone - collar forms around the diaphysis (mid - part) not the ends of the cartilage rod. The epiphyseal plate is a cartilaginous area, not a bony area that joins the shaft to the ends.

Answer:

A primary ossification center begins replacing cartilage in the central region of the cartilage rod.