The number of floating ribs in humans is ............ . (in $pairs$)

The tongue bone is known as:

The bones that form a bridge between the cranium and the upper jaw dorsally and ventrally,respectively,are

Which of the following statements are correct with reference to the human endoskeleton?
$A$. Human skull is monocondylic.
$B$. The joint between any two adjoining vertebrae is a cartilaginous joint.
$C$. In human beings, the number of cervical vertebrae is seven.
$D$. All ribs except the last $2$ pairs are bicephalic.
$E$. The occipital bone of the skull is articulated with the atlas vertebra.
Choose the correct answer from the options given below:

In mammals,the lower jaw is made up of ....................

Which of the following structures are not common to both atlas and axis vertebrae?