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 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

Figure 15.33 Which of the following statements about common features of chordates is true?a. The dorsal hollow nerve cord is part of the chordate central nervous system.b. In vertebrate fishes, the pharyngeal slits become the gills.c. Humans are not chordates because humans do not have a tail.d. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.

Which of the following features does not distinguish humans as a member of phylum Chordata? a. Human embryos undergo indeterminate cleavage. b. A spinal cord runs along an adult human’s dorsal side. c. Human embryos exhibit pharyngeal arches and gill slits. d. The human coccyx forms from an embryonic tail.

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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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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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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.