Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem

Helping other individual at a reproductive cost to oneself can be adaptive if those helped are _______.

  1. a. members of another species
  2. b. campetitors for mates
  3. c. close relatives
  4. d. counterfeit signalers

Summary Introduction

Concept introduction: Altruism is a process when an organism behaves in a way that benefits others instead of being harmed or risking oneself. Eusocial animals are organisms that live in a multigenerational family group with a reproductive division of labor. The only way to develop the altruistic behavior is through kin selection. Kin selection is a type of natural selection that favors social evolution of an organism.


Reason for the correct statements:

Kin selection is a kind of phylogenetic approach that favors the reproductive growth of an organism’s relatives when estimating the genetic fitness of the individual.

Option c. is given as “close relatives.” Altruists have the characteristic feature that the close relatives are involved in promoting the reproductive success of the other individuals. Thus, this increases their adaption and inclusive fitness into the population. Hence, option c. is the correct answer.

Reasons for the incorrect statements:

Option a. is given as “members of another species”...

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