In primates with large facial skeletons powerful muscles are required to keep the head up.The size of this muscle is reflected in the presence on the back of the skull of a:
A)nuchal crest
B)sagittal crest
C)mandibular crest
D)occipital crest

Question

Quizplus · Accepted Answer

The nuchal crest is a bony ridge located on the back of the skull, specifically the occipital bone. It provides attachment points for muscles that are involved in head movement and posture, including the trapezius and splenius capitis muscles. Primates with large facial skeletons, such as gorillas, require powerful muscles to keep the head upright, which is reflected in the size of the nuchal crest.

In Primates with Large Facial Skeletons Powerful Muscles Are Required