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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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In voles, species with a higher concentration of receptors for the hormone oxytocin are more likely to __________.

  1. a. form a pair bond
  2. b. engage in mating with multiple partners
  3. c. be eusocial
  4. d. form a dominance hierarchy

Summary Introduction

Concept introduction: Pair bonding is the strong relationship that develops between the heterosexuals of some species. Pair bonding represents the social attachment mostly between the monogamous animals. These pair-bonding behaviors have a genetic influence that can cause modifying changes in the secretion of several hormones.

Explanation

Reasons for correct statement:

The species-specific difference in the behavior arises from the differences in how the voles respond to the hormones like oxytocin or vasopressin. The inherited differences in the number and distribution of certain hormone receptors influence mating and bonding behavior.

Option a. is given as “form a pair bond”. The action of oxytocin is essential for the formation and maintenance of a pair bond. The species with the higher concentration of these oxytocin receptors are in the part of the central nervous system, which is associated with social learning. The expression will be higher in the sub-thalamic nucleus and nucleus accumbens core in the hypothalamus. Hence, option a. is correct answer.

Reasons for incorrect statement:

Option b...

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