Chapter 27, Problem 3TC

Summary Introduction

To determine:

The relationship between the brain size and diet in orangutan evolution.

Given:

Scientists studying orangutans on the Indonesian islands of Borneo and Sumatra recently found that the orangutans inhabiting the food- scarce island of Borneo have smaller brains than those on Sumatra, where food is abundant.

Introduction:

The primate includes gorilla, chimpanzee, orangutan which shows differences in body size and food habit. When compared to human the gorilla and orangutans are much higher in body size than the human. Moreover, the brain size of them accounts for only one third of the brain size of the human.