Why childbirth is so difficult. Introduction: Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

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Chapter 43.5, Problem 1HYEW

Summary Introduction

To determine:

Why childbirth is so difficult.

Introduction:

Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

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According to Richard Owen, the forelimbs of an adult human (with hands, adapted for grasping fruit from a tree), and the forelimbs of an adult bat (with wings, adapted for flight), are both derived from the same mammalian embryological structures, so they must represent: homologous structures, with similar embryonic anatomy, but different functions analogous structures, with different functions, and different embryonic anatomy analogous structures, with similar functions, but different embryonic anatomy analogous structures, with different embryonic anatomy, and different functions homologous structures, with different embryonic anatomy, but similar functions

One of the earliest experimental embryology experiments was conducted by Wilhelm Roux, who used a hot needle to kill one of the cells in an amphibian embryo at the two-cell stage. In the experiment, the remaining living cell formed only half of an embryo. However, later vertebrate experiments showed that by completely separating cells in early embryos, each can make complete individuals. What could explain the discrepancy in these experiments?

Vertebrate embryos all follow a very similar developmental process. Which statement could explain this similarity? All vertebrates develop a backbone that protects the spinal cord. All vertebrates live in similar environments which require the same adaptations. All vertebrates inherit the same sequence of DNA from their parents. All vertebrates require the same nutrients during embryological development.

Answer 2

Question

Chapter 43.5, Problem 1HYEW

Summary Introduction

To determine:

Why childbirth is so difficult.

Introduction:

Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 3

Question

Chapter 43.5, Problem 1HYEW

Summary Introduction

To determine:

Why childbirth is so difficult.

Introduction:

Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 4

Question

Chapter 43.5, Problem 1HYEW

Summary Introduction

To determine:

Why childbirth is so difficult.

Introduction:

Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

Expert Solution & Answer

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Answer 5

Chapter 43.5, Problem 1HYEW

Summary Introduction

To determine:

Why childbirth is so difficult.

Introduction:

Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

Answer 6

Chapter 43.5, Problem 1HYEW

Summary Introduction

To determine:

Why childbirth is so difficult.

Introduction:

Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

Answer 7

Chapter 43.5, Problem 1HYEW

Summary Introduction

To determine:

Why childbirth is so difficult.

Introduction:

Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

Answer 8

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Answer 9

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Answer 11

Ch. 43.1 - define development and describe how cell division...Ch. 43.2 - Prob. 1CYL Ch. 43.3 - describe early development in amphibians,...Ch. 43.3 - Prob. 2CYL Ch. 43.4 - Prob. 1TC Ch. 43.4 - Prob. 2TC Ch. 43.4 - Does the development of a human limb, and the rest...Ch. 43.4 - Prob. 1CYL Ch. 43.4 - Prob. 2CYL Ch. 43.5 - Prob. 1TC

Why childbirth is so difficult. Introduction: Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

Solution Summary: The author explains that the women's hip has evolved wider so that large headed infants would be easily squeezed out. In humans, childbirth is painful due to the large head of a newborn baby and smaller pelvic opening in

Concept explainers

Videos

To determine:

Why childbirth is so difficult.

Introduction:

Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

Want to see the full answer?

Chapter 43 Solutions

Why childbirth is so difficult. Introduction: Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

Solution Summary: The author explains that the women's hip has evolved wider so that large headed infants would be easily squeezed out. In humans, childbirth is painful due to the large head of a newborn baby and smaller pelvic opening in

Concept explainers

Videos

To determine: Why childbirth is so difficult. Introduction: Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.

Want to see the full answer?

Chapter 43 Solutions

To determine:

Why childbirth is so difficult.

Introduction:

Earlier, head of the newborn babies was smaller due to the poor nutrients. But now, the women’s hip has evolved wider so that large headed infants would be easily squeezed out.