Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

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Chapter 9, Problem 14MC

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Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

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Which of these situations offers the lowest “opportunity for selection” for males? A. Females choose mates with a fancy ornament. B. Every female chooses one male to mate with for life. C. Locations that females need access to in order to reproduce are rare. D. Males fight each other for access to groups of females.

A new species is discovered in which males care for offspring after birth, and females leaves the nest immediately. In this species, males are likely to A. Have more offsprings overall than females. B. Have fewer offspring overall than females. C. Be promiscuous. D. Have lower parental investment.

Which of the following statements is a reason why females are usually the "choosier" sex? A. They expend fewer resources in caring for their offspring. B. They have higher potential fitness than males. C. They have fewer opportunities to contribute offspring than males. D. They directly compete with each other for mates.

Answer 2

Question

Chapter 9, Problem 14MC

Summary Introduction

Introduction:

Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

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Answer 3

Question

Chapter 9, Problem 14MC

Summary Introduction

Introduction:

Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

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Answer 4

Question

Chapter 9, Problem 14MC

Summary Introduction

Introduction:

Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

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Answer 5

Chapter 9, Problem 14MC

Summary Introduction

Introduction:

Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

Answer 6

Chapter 9, Problem 14MC

Summary Introduction

Introduction:

Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

Answer 7

Chapter 9, Problem 14MC

Summary Introduction

Introduction:

Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

Answer 8

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Answer 11

Ch. 9 - Prob. 1SA Ch. 9 - Prob. 2SA Ch. 9 - Prob. 3SA Ch. 9 - Prob. 4SA Ch. 9 - Prob. 5SA Ch. 9 - Prob. 6SA Ch. 9 - Prob. 7SA Ch. 9 - Prob. 8SA Ch. 9 - Prob. 9SA Ch. 9 - Prob. 10SA

Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

Solution Summary: The author explains that sexual dimorphism evolved due to male-male competition and the need to attract females.

Concept explainers

Introduction:

Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

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Chapter 9 Solutions

Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

Solution Summary: The author explains that sexual dimorphism evolved due to male-male competition and the need to attract females.

Concept explainers

Introduction: Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.

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Chapter 9 Solutions

Introduction:

Sexual dimorphism is thought to have evolved due to male-male competition and the need to attract females.