Chapter 17, Problem 20WIO

Summary Introduction

To determine:

The two hypotheses that explain the reason for the survival of Homo sapiens.

Introduction:

All primates including humans, monkeys, and apes share many physical characteristics. They have grasping hands with opposable thumbs that bend inwards to touch the pads of the fingers. They have flat nails instead of claws in fingers and toes. They get binocular vision with the eyes in front of the skull. The primate brain is relatively larger.