Chapter 16, Problem 4A

Summary Introduction

Introduction :

The Asian gibbons and their close relatives are the arboreal gymnasts of the ape family. They live on the trees and have ability to walk. Though they have the ability to walk on either two or four legs like all great apes. They generally move from branch to branch using hands.

Answer to Problem 4A

Correct answer :

The correct answer is option (A) brachiation.

Explanation of Solution

Explanation/justification for the correct answer :

Option (A) brachiation. It is a type of movement in gibbons in which they generally move from branch to branch using a hand-over-hand swinging motion. This motion enables an adult gibbon to move almost 3 m in one swing. Thus, this is the correct answer.

The explanation for the incorrect answer :

Option (B) knuckle-walking. It is form of quadrupedal walking in which the forelimbs hold the fingers. Thus, this is an incorrect option.

Option (C) quadruped movement. It is type of movement on all four limbs. Thus, this is an incorrect answer.

Option (D) upright locomotion. It is a type of movement in which walking upright on two legs. Thus, this is an incorrect answer.