WHAT IS LIFE? GDE.TO BIOLOGY W/PHYSIO.
5th Edition
ISBN: 9781319272531
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 12, Problem 6SA
Summary Introduction
To explain: Humans are evolving or losing a tail.
Introduction: The tail is the portion of the animal's body that is located at the back; the phrase generally refers to a separate, mobile appendage to the midsection (torso). It is the area of the body that, in mammals, reptiles, and birds, generally corresponds to the coccyx and sacrum.
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Mammals have a particularly good sense of earing thanks to their inner ear which includes three tiny bones. Reptiles, in contrast, have a single inner ear bone. The lower jaw of reptiles is composed of multiple bones while the lower jaw of mammals is a single bone. Fossil and developmental evidence indicate that the inner ear bones of mammals evolved from lower jawbones. This suggests that the inner ear bones of mammals are
1. an analogy
2. an exaptation
3. a living fossil
4. a transitional trait
5. a vestigial structure
Mammals have a particularly good sense of earing thanks to their inner ear which
includes three tiny bones. Reptiles, in contrast, have a single inner ear bone. The
lower jaw of reptiles is composed of multiple bones while the lower jaw of mammals
is a single bone. Fossil and developmental evidence indicate that the inner ear bones
of mammals evolved from lower jawbones. This suggests that the inner ear bones of
mammals are
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Chapter 12 Solutions
WHAT IS LIFE? GDE.TO BIOLOGY W/PHYSIO.
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