Lower jaw of mammals in made up of

Correct Option is: D. Dentary

Solution:

• In mammals teeth are present in both the jaws as semicircular arches. The teeth are embedded in the sockets of the jaw bones maxillae (upper) and mandible (lower). such teeth are called as  thecodont.
• The number of teeth is fixed and are produced in two sets- temporary or deciduous and permanent.
• There are 32 teeth in the permanent set. Each jaw has 16 teeth.

Final Answer: The lower jaw consists of a single bone, the dentary on each side. It is a movable jaw of the mouth.