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

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Chapter 11, Problem 10MC

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Introduction:

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

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Compared with external fertilization, in internal fertilization,a. male gametes have a higher chance to come into close proximity tofemale gametes.b. gametes are less protected against predation or other harmfulenvironmental factors.c. there is a decreased likelihood of desiccation of gametes.d. gametes come into contact only outside the mother’s reproductivetract.e. Both b and c are true of internal fertilization.

Compare and contrast sexual and asexual reproduction. Identify the most accurate statement. a. Asexual reproduction results in more offspring per mother. b. Sexual reproduction is always more costly. c. Sexual reproduction is associated with an increase in homozygosity. d. Asexual reproduction is always bad for a species.

A. Water currents in the ocean are much stronger than any sperm. How do sperm and egg find each other? B. In humans there are no water currents and the volume of the female reproductive tract is relatively limited. Then, why does the male have so many sperm? C. Why do sea urchins have external fertilization? D. Then why don't the parents take care of the young? E. Because the urchin life involves two or more ecological niches, they are more susceptible to predation and exposure to environmental toxins. What environmental conditions, predators and toxins might they be exposed to at each stage?

Answer 2

Question

Chapter 11, Problem 10MC

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 11, Problem 10MC

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 11, Problem 10MC

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 11, Problem 10MC

Summary Introduction

Introduction:

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

Answer 6

Chapter 11, Problem 10MC

Summary Introduction

Introduction:

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

Answer 7

Chapter 11, Problem 10MC

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 9

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Answer 10

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Answer 11

Ch. 11 - Prob. 1SA Ch. 11 - Prob. 2SA Ch. 11 - Prob. 3SA Ch. 11 - Prob. 4SA Ch. 11 - Prob. 5SA Ch. 11 - Prob. 6SA Ch. 11 - Prob. 7SA Ch. 11 - Prob. 8SA Ch. 11 - Prob. 9SA Ch. 11 - 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 is thought to have 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 11 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 is thought to have 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 11 Solutions

Introduction:

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