For purposes of differentiation,what is the unique feature of the jaw fossils of non-mammalian tetrapods?
A)The lower and upper jaws hinge between the same bones.
B)The lower jaw is composed of several bones.
C)There are three bones in the middle ear.
D)Teeth are differentiated for function.

Question

Quizplus · Accepted Answer

The unique feature of the jaw fossils of non-mammalian tetrapods is that the lower jaw is composed of several bones, while in mammals it is a single bone (the dentary). This characteristic is known as "non-mammalian jaw articulation."

For Purposes of Differentiation,what Is the Unique Feature of the Jaw