
Concept explainers
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.
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.
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.
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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Chapter 19 Solutions
Evolution, Fourth Edition (looseleaf)
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