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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Social behavior:

a. is exhibited only by animals that live in groups with closerelatives.

b. cannot evolve in animals that maintain territories.

c. evolved because group living provides benefits to individualsin the group.

d. is never observed in insects and other invertebrate animals.

e. can be explained only by the hypothesis of kin selection.

Summary Introduction

Introduction:

Social behavior, that is, living in groups, is prevailing in various species. It may be in small family groups or large groups of related individuals as well as of unrelated individuals. The benefit of this is division of labor such as foraging, defense among members, and chances of better survival.

Explanation

Justification/explanation for the correct answer:

Option (c) says that social behavior evolved because group living provides benefit to individuals in the group. This is so because living in groups involves division of labor, some of them are involved in defense, while others search for food and shelter. This provides better chances of survival. Hence, option (c) is correct.

The explanation for the incorrect answers:

Option (a) states that social behavior is exhibited only by animals that live in groups of close relatives. Unrelated individuals also live in groups such as humans residing in a colony with their neighbors that belong to different cultures. Hence, it is an incorrect option.

Option (b) states that social behavior cannot evolve in animals that maintain their territory. This is not true as wolves maintain their territories as well as they remain in pack (group)...

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