Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

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Chapter 27, Problem 4TYU

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Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

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Which of the following could be considered the most recentcommon ancestor of living tetrapods?(A) a sturdy-finned, shallow-water lobe-fin whose appendages had skeletal supports similar to those of terrestrialvertebrates(B) an armored, jawed placoderm with two pairs of appendages(C) an early ray-finned fish that developed bony skeletalsupports in its paired fins(D) a salamander that had legs supported by a bony skeletonbut moved with the side-to-side bending typical of fishes

Based on the diagram, which statement is true about the evolution of animals? A. Echinoderms evolved after chordates. B. Mineralized skeletons deveoloped before notocords. C. Chrondricthyes share chordate ancestors with myxini. D. The ancestral deutrosome had a notocord and vertebrae

Which of the following list places the important evolutionary innovations in the correct order of appearance in the chordate phylogeny? a. Vertebrae - bony skeleton - notochord - jaws - internal nares - lobe fins b. Jaws - notochord - bony skeleton - vertebrae - lobe fins - internal nares c. Notochord - jaws - vertebrae - internal nares - lobe fins - bony skeleton d. Notochord - vertebrae - jaws - bony skeleton - lobe fins - internal nares

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Chapter 27, Problem 4TYU

Summary Introduction

Introduction:

Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

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Chapter 27, Problem 4TYU

Summary Introduction

Introduction:

Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

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Chapter 27, Problem 4TYU

Summary Introduction

Introduction:

Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

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Answer 5

Chapter 27, Problem 4TYU

Summary Introduction

Introduction:

Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

Answer 6

Chapter 27, Problem 4TYU

Summary Introduction

Introduction:

Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

Answer 7

Chapter 27, Problem 4TYU

Summary Introduction

Introduction:

Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

Answer 8

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Answer 11

Ch. 27.1 - Prob. 1CC Ch. 27.1 - Prob. 2CC Ch. 27.2 - What is the Cambrian explosion? Why is it...Ch. 27.2 - Prob. 2CC Ch. 27.3 - Prob. 1CC Ch. 27.3 - WHAT IF? Would it be accurate to describe the...Ch. 27.4 - Prob. 1CC Ch. 27.4 - Describe two key adaptations of aquatic...Ch. 27.4 - MAKE CONNECTIONS The radiation of bilaterians in...Ch. 27.5 - Describe two adaptations that have enabled insects...

Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

Solution Summary: The author explains that the most recent common ancestor of living tetrapods was a sturdy-finned, shallow-water lobe fin whose appendages had skeletal support similar to those of

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Introduction:

Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

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Chapter 27 Solutions

Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

Solution Summary: The author explains that the most recent common ancestor of living tetrapods was a sturdy-finned, shallow-water lobe fin whose appendages had skeletal support similar to those of

Concept explainers

Videos

Introduction: Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.

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Chapter 27 Solutions

Introduction:

Gnathostomes are also known as jawed vertebrates that came into existence around 450 million years ago. They had tail and paired fins that made them highly successful predators in the aquatic habitat.