Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 25, Problem 5TYU
Why is parsimony a useful tool for assessing which phylogenetic tree is most accurate? Why was parsimony misleading in the case of the astragalus during the evolution of artiodactyls?
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Chapter 25 Solutions
Biological Science (6th Edition)
Ch. 25 - 1. Choose the best definition of a fossil.
a. any...Ch. 25 - 2. CAUTION True or false? The absence of a trait...Ch. 25 - Which of the following best characterize an...Ch. 25 - Which of the following is an example of homoplasy?...Ch. 25 - 5. Why is parsimony a useful tool for assessing...Ch. 25 - Prob. 6TYUCh. 25 - Fossilization continues even today. If you wanted...Ch. 25 - Prob. 8TYUCh. 25 - 9. MODEL Use the data matrix below to draft a...Ch. 25 - Prob. 10TYPSS
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- Tiktaalik and Protarchaeopteryx are examples of transitional forms. In paleontology, what does transitional form mean?arrow_forwardDolphins and fish have similar body shapes. Is this feature more likely a homologous or analogous trait? Why is it so important for scientists to distinguish between homologous and analogous characteristics before building phylogenetic trees?arrow_forwardHow many clades are there in this phylogenyarrow_forward
- Molecular sequence data indicate that Xenoturbella is a deuteros-tome. Are there corresponding morphological characters?arrow_forwardHow has the abundance and diversity of Bivalves clade changed over time? –How did the synapomorphies of the clade allow the group to diversify and expand? Has the clade been affected by mass extinction events, either positively or negatively? If so, what caused the extinction event? Is the clade now at its most diverse and abundant? Or if that was in the past, when? If still extant, are species in the clade thriving or threatened with extinction?arrow_forwardWhy are “reptiles,” as traditionally defined, a paraphyletic group? How has cladistic taxonomy revised Reptilia to make it monophyletic?arrow_forward
- In the phylogeny to the right, draw a box around the clade Sarcopterygii (lobe-finned fishes). Label it “A”. b. Draw a box around the sister group to Echinodermata. Label it “B”. c. Circle the node that corresponds to the most recent common ancestor of Actinopterygii and Chodrichthyes. Label it “C.”arrow_forwardWhat is the difference between primitive and advanced species and why is it now considered wrong to call a species primitive?arrow_forwardHemichordates are a sister group to the chordates. This group contains organisms called acorn worms. They don’t have all of the chordate characteristics - just some. Question: Which ones are synapomorphies of the chordates and which ones are symplesiomorphies based on this cladogram?arrow_forward
- What is the sister group to the Tetrapoda clade?arrow_forwardDraw a phylogenetic diagram showing only the interrelationships among the following clades: Tetrapoda, Lissamphibia, Amniota, Diapsida, Synapsida, Turtles, Archosauriaarrow_forwardBased on the phylogenetic tree diagram in Figure 34.2, predict which vertebrate groups should have lungs or lung derivatives. Explain.arrow_forward
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