The vertebrate classes that are paraphyletic. Introduction: Chordata is divided into Urochordata, Cephalochordata, and Vertebrata. The chordates have several characteristics such as the presence of the notochord, nerve cord, pharyngeal slits, and post-anal tail. The organisms may be placed under different groups based on the presence or absence of ancestor characters.

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Answer 1

Question

Chapter 34, Problem 1IQ

Summary Introduction

To explain: The vertebrate classes that are paraphyletic.

Introduction: Chordata is divided into Urochordata, Cephalochordata, and Vertebrata. The chordates have several characteristics such as the presence of the notochord, nerve cord, pharyngeal slits, and post-anal tail. The organisms may be placed under different groups based on the presence or absence of ancestor characters.

Expert Solution & Answer

Explanation of Solution

Paraphyletic taxon includes only common ancestors but not all of its descendants. It is known for shared ancestral characters. The fish are paraphyletic. This is because the group consist of all other vertebrates that arose within fishes and Sarcopterygii is a sister taxon. Reptiles are also paraphyletic as birds arise from it and sister taxon to crocodilians. Amphibians may be considered as paraphyletic if extinct amphibians are taken into account as they are more closely related to amniotes.

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Answer 2

Question

Chapter 34, Problem 1IQ

Summary Introduction

To explain: The vertebrate classes that are paraphyletic.

Introduction: Chordata is divided into Urochordata, Cephalochordata, and Vertebrata. The chordates have several characteristics such as the presence of the notochord, nerve cord, pharyngeal slits, and post-anal tail. The organisms may be placed under different groups based on the presence or absence of ancestor characters.

Expert Solution & Answer

Explanation of Solution

Paraphyletic taxon includes only common ancestors but not all of its descendants. It is known for shared ancestral characters. The fish are paraphyletic. This is because the group consist of all other vertebrates that arose within fishes and Sarcopterygii is a sister taxon. Reptiles are also paraphyletic as birds arise from it and sister taxon to crocodilians. Amphibians may be considered as paraphyletic if extinct amphibians are taken into account as they are more closely related to amniotes.

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Answer 3

Question

Chapter 34, Problem 1IQ

Summary Introduction

To explain: The vertebrate classes that are paraphyletic.

Introduction: Chordata is divided into Urochordata, Cephalochordata, and Vertebrata. The chordates have several characteristics such as the presence of the notochord, nerve cord, pharyngeal slits, and post-anal tail. The organisms may be placed under different groups based on the presence or absence of ancestor characters.

Expert Solution & Answer

Explanation of Solution

Paraphyletic taxon includes only common ancestors but not all of its descendants. It is known for shared ancestral characters. The fish are paraphyletic. This is because the group consist of all other vertebrates that arose within fishes and Sarcopterygii is a sister taxon. Reptiles are also paraphyletic as birds arise from it and sister taxon to crocodilians. Amphibians may be considered as paraphyletic if extinct amphibians are taken into account as they are more closely related to amniotes.

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Answer 4

Question

Chapter 34, Problem 1IQ

Summary Introduction

To explain: The vertebrate classes that are paraphyletic.

Introduction: Chordata is divided into Urochordata, Cephalochordata, and Vertebrata. The chordates have several characteristics such as the presence of the notochord, nerve cord, pharyngeal slits, and post-anal tail. The organisms may be placed under different groups based on the presence or absence of ancestor characters.

Expert Solution & Answer

Explanation of Solution

Paraphyletic taxon includes only common ancestors but not all of its descendants. It is known for shared ancestral characters. The fish are paraphyletic. This is because the group consist of all other vertebrates that arose within fishes and Sarcopterygii is a sister taxon. Reptiles are also paraphyletic as birds arise from it and sister taxon to crocodilians. Amphibians may be considered as paraphyletic if extinct amphibians are taken into account as they are more closely related to amniotes.

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Answer 5

Chapter 34, Problem 1IQ

Summary Introduction

To explain: The vertebrate classes that are paraphyletic.

Introduction: Chordata is divided into Urochordata, Cephalochordata, and Vertebrata. The chordates have several characteristics such as the presence of the notochord, nerve cord, pharyngeal slits, and post-anal tail. The organisms may be placed under different groups based on the presence or absence of ancestor characters.

Expert Solution & Answer

Explanation of Solution

Paraphyletic taxon includes only common ancestors but not all of its descendants. It is known for shared ancestral characters. The fish are paraphyletic. This is because the group consist of all other vertebrates that arose within fishes and Sarcopterygii is a sister taxon. Reptiles are also paraphyletic as birds arise from it and sister taxon to crocodilians. Amphibians may be considered as paraphyletic if extinct amphibians are taken into account as they are more closely related to amniotes.

Answer 6

Chapter 34, Problem 1IQ

Summary Introduction

To explain: The vertebrate classes that are paraphyletic.

Introduction: Chordata is divided into Urochordata, Cephalochordata, and Vertebrata. The chordates have several characteristics such as the presence of the notochord, nerve cord, pharyngeal slits, and post-anal tail. The organisms may be placed under different groups based on the presence or absence of ancestor characters.

Expert Solution & Answer

Explanation of Solution

Paraphyletic taxon includes only common ancestors but not all of its descendants. It is known for shared ancestral characters. The fish are paraphyletic. This is because the group consist of all other vertebrates that arose within fishes and Sarcopterygii is a sister taxon. Reptiles are also paraphyletic as birds arise from it and sister taxon to crocodilians. Amphibians may be considered as paraphyletic if extinct amphibians are taken into account as they are more closely related to amniotes.

Answer 7

Chapter 34, Problem 1IQ

Summary Introduction

To explain: The vertebrate classes that are paraphyletic.

Introduction: Chordata is divided into Urochordata, Cephalochordata, and Vertebrata. The chordates have several characteristics such as the presence of the notochord, nerve cord, pharyngeal slits, and post-anal tail. The organisms may be placed under different groups based on the presence or absence of ancestor characters.

Answer 8

Expert Solution & Answer

Explanation of Solution

Paraphyletic taxon includes only common ancestors but not all of its descendants. It is known for shared ancestral characters. The fish are paraphyletic. This is because the group consist of all other vertebrates that arose within fishes and Sarcopterygii is a sister taxon. Reptiles are also paraphyletic as birds arise from it and sister taxon to crocodilians. Amphibians may be considered as paraphyletic if extinct amphibians are taken into account as they are more closely related to amniotes.