Twelve pairs of ribs and twelve pairs of cranial nerves are found in

The vertebra which bears the whole weight of the skull is

Which of the following bones is not present in pairs?

Which of the following is not a function of the endoskeleton?

The part of the axial skeleton that includes the upper jaw,lower jaw,hyoid apparatus,and gill arches is called:

Read the following Assertion $(A)$ and Reason $(R)$ and choose the correct option.
Assertion $(A):$ All $12$ pairs of ribs are called bicephalic.
Reason $(R):$ Each rib is connected dorsally to the vertebral column by $2$ heads of articulation.