Chapter 16, Problem 3A

Summary Introduction

To replace:

The correct vocabulary term in place of the underlined word.

Introduction:

Most of the mammals rely on their sense of smell, but except a few most of the primates rely more on vision. Their eyes are protected by bony eye sockets and are on the front of their face. This creates overlapping fields of vision.

Answer to Problem 3A

Binocular vision evolved as the faces of primates became flattened.

Explanation of Solution

The eyes of most of the primates are placed on the front of their face. This creates overlapping fields of vision called binocular vision. Forward looking eyes allow for a greater field of depth perception and enable primates to judge relative distance and movement of an object.