Question
Biology Question on Skeletal System
Which of the following is made up of a single bone in mammals ?
A
Lower jaw
B
Hyoid
C
Zygomatic arch
D
Upper jaw
Answer
Lower jaw
Explanation
Solution
Each ramus of lower jaw or mandible is formed of a single large membrane bone (dentary), which is broad and flat in the back but narrow and conical in front. The front ends of both dentaries medially join by a symphysis.