Question Detail

ZOO 101 ZOO 101 Past Questions Objective Question

Question

The evolutionary significance of the single skull hole in mammals is:
Options
A Reduced brain size
B Increased jaw muscle attachment
Correct Answer
C Simplified skull structure
D Lack of teeth
Correct Answer

Option B is the correct answer.

Detailed Explanation

The single skull hole (temporal fenestra) in mammals provides increased surface area for attachment of jaw muscles, allowing for a stronger and more efficient bite compared to earlier synapsids.

Hint

This opening in the skull allows for attachment of powerful jaw muscles.

Question Info