Evolution
Evolution
4th Edition
ISBN: 9781605356051
Author: Douglas Futuyma, Mark Kirkpatrick
Publisher: SINAUER
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Chapter 19, Problem 6PDT
Summary Introduction

To explain: Whether clades with few living species may be very young.

Introduction: A group of organisms that have been originated and evolved from one common ancestor is called a clade. The variation occurred due to the evolution of a common ancestor to adapt and diversify into one or more species and subgroups. Since the origin is same, clade is said to be monophyletic. The construction of a phylogenetic tree helps to observe clades.

Summary Introduction

To explain: Alternate hypothesis to define different clades.

Introduction: A group of organisms that have been originated and evolved from one common ancestor is called a clade. The variation occurred due to the evolution of a common ancestor to adapt and diversify into one or more species and subgroups. Since the origin is same, clade is said to be monophyletic. The construction of a phylogenetic tree helps to observe clades.

Summary Introduction

To explain: Evidence of the hypothesis used to define clades.

Introduction: A group of organisms that have been originated and evolved from one common ancestor is called a clade. The variation occurred due to the evolution of a common ancestor to adapt and diversify into one or more species and subgroups. Since the origin is same, clade is said to be monophyletic. The construction of a phylogenetic tree helps to observe clades.

Summary Introduction

To explain: The components constituting the evidence used to define different clades.

Introduction: A group of organisms that have been originated and evolved from one common ancestor is called a clade. The variation occurred due to the evolution of a common ancestor to adapt and diversify into one or more species and subgroups. Since the origin is same, clade is said to be monophyletic. The construction of a phylogenetic tree helps to observe clades.

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n which situation would it make sense to use the phylogenetic species concept?     When you are not able to collect data about how individuals in your study use their habitat, but you are able to collect reproductive data     When you are able to collect data about how individuals in your study use their habitat, but you are unable to determine if they interbreed     When you only have genetic data about each organism in your study     When working with fossils from extinct organisms
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Draw a phylogenetic reconstruction for the hypothetical frog species. Once you have a cladogram you feel confident about, use lines and labels on cladogram to indicate where character states hanged. How many evolutionary changes occurred in your phylogeny? Is there evidence of an evolutionary convergence having occurred in your phylogeny? How about evolutionary reversals?
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