A(n) ________ is a ridge of bone running from the front to the rear along the midline of the skull.
Fill in the blank(s) with correct word
Question 2
Composite tools
A) increase the power users could put into a blow with a tool
B) are tools in which blades or flakes are attached to handles
C) were invented by Upper Paleolithic people
D) all of the above
E) none of the above