12th Edition

ISBN: 9780135188743

Author: Urry

Publisher: PEARSON

Concept explainers

The history and science of origin and evolution comprise two events, the beginning of life and expansion of life. Our earth originated about 4.5 billion years ago. The term evolution is derived from two Latin words and means the act of unfolding or unrol…

Cladistics

Cladistics is a technique in the classification of organisms, where they are grouped into different clades. The proof for the relationships that are hypothesized is based on the shared derived characteristics known as synapomorphies. These characteristic…

Outgroups

Outgroups are significant in studying cladistics or phylogenetics (that describe the evolutionary relationship between different organisms). Further, it is also important to understand the differences and similarities between different organisms.

Taxonomy

It is the branch of biology that works with the identification of organisms at first, then naming, and classification of them into phenetic or phylogenetic groups (a classification system). In other words, it is the scientific study of biological diversi…

Phylogenetics

Phylogenetics is the scientific study of how various groups of organisms are related at the evolutionary level. It finds the relationship between various organisms based on their evolutionary similarities and differences. It is a part of the taxonomy. Al…

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Textbook Question

Chapter 32.2, Problem 2CC

VISUAL SKILLS Ø Explain what is represented by the red colored portion of the branch leading to animals. (See Figure26.5, "Visualizing Phylogenetic Relationships," to review phylogenetic tree diagrams.)

Chapter 32.2, Problem 2CC, VISUAL SKILLS Explain what is represented by the red colored portion of the branch leading to

Common ancestorof fungi and animals (1 bya)

Sponges

AI other animals

Most recent common ancestor of animals (770 mya)

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Chapter 32.2, Problem 1CC

Chapter 32.2, Problem 3CC

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Chapter 32 Solutions

Campbell Biology

Ch. 32.1 - Summarize the main stages of animal development....Ch. 32.1 - WHAT IF? What animal characteristics would be...Ch. 32.2 - Put the following milestones in animal evolution...Ch. 32.2 - VISUAL SKILLS Explain what is represented by the...Ch. 32.2 - MAKE CONNECTIONS Evaluate whether the origin of...Ch. 32.3 - Compare three aspects of the early development of...Ch. 32.3 - Prob. 2CC Ch. 32.3 - Prob. 3CC Ch. 32.4 - Prob. 1CC Ch. 32.4 - WHAT IF? Suppose ctenophores are basal metazoans...

Ch. 32.4 - Prob. 3CC Ch. 32 - Prob. 32.1CR Ch. 32 - What caused ihe Cambrian exploston? Describe...Ch. 32 - Describe how body plans provide useful Information...Ch. 32 - Prob. 32.4CR Ch. 32 - Prob. 1TYU Ch. 32 - The distinction between sponges and other animal...Ch. 32 - Prob. 3TYU Ch. 32 - Prob. 4TYU Ch. 32 - EVOLUTION CONNECTION A professor begins a lecture...Ch. 32 - WRITE ABOUT A THEME: INTERACTIONS Animal life...Ch. 32 - SYNTHESIZE YOUR KNOWLEDGE This organism is an...

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