Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Textbook Question
Chapter 25, Problem 25.2CR
What are the challenges of estimating the ages of old fossils? Explain how these challenges may be overcome in some circumstances.
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Chapter 25 Solutions
Campbell Biology (10th Edition)
Ch. 25.1 - What hypothesis did Miller test in his classic...Ch. 25.1 - How would the appearance of protocells have...Ch. 25.1 - Prob. 3CCCh. 25.2 - WHAT IF? Your measurements indicate that a...Ch. 25.2 - Describe an example from the fossil record that...Ch. 25.2 - Prob. 3CCCh. 25.3 - The first appearance of free oxygen in the...Ch. 25.3 - What evidence supports the hypothesis that...Ch. 25.3 - WHAT IF? What would a fossil record of life today...Ch. 25.4 - Explain the consequences of plate tectonics for...
Ch. 25.4 - What factors promote adaptive radiations?Ch. 25.4 - Prob. 3CCCh. 25.5 - Explain how new body forms can originate by...Ch. 25.5 - Why is it likely that Hox genes have played a...Ch. 25.5 - MAKE CONNECTIONS Given that changes in morphology...Ch. 25.6 - How can the Darwinian concept of descent with...Ch. 25.6 - Prob. 2CCCh. 25 - Describe the roles that montmorillonite clay and...Ch. 25 - What are the challenges of estimating the ages of...Ch. 25 - What is the "Cambrian explosion," and why is it...Ch. 25 - Explain how the broad evolutionary changes seen in...Ch. 25 - How could changes in a Single gene or DNA region...Ch. 25 - Explain the reasoning behind the Statement...Ch. 25 - Prob. 1TYUCh. 25 - The oxygen revolution changed Earth's environment...Ch. 25 - Prob. 3TYUCh. 25 - Prob. 4TYUCh. 25 - Which of the following steps has not yet been...Ch. 25 - Prob. 6TYUCh. 25 - Prob. 7TYUCh. 25 - EVOLUTION CONNECTION Describe how gene flow,...Ch. 25 - Prob. 9TYUCh. 25 - WRITE ABOUT A THEME: ORGANIZATION You have seen...Ch. 25 - Prob. 11TYU
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- How do we know the age of a fossil?arrow_forwardby studying the limbs and fossils of different animals, such as a horse leg and a human leg, scientists have noticed that there are similarities in their bone structures. this is evidence that their bone structures and limbs may have evolved in similar ways. The scenario is describing a relationship known as causation . The scenario is describing intermediate fossils . The scenario is describing a relationship known as correlation . The scenario is describing transitional fossils .arrow_forwardWhat factors are necessary for fossils to occur? I. Abundant MembersII. Exist for a long timeIII. Have many body parts A) I and II. B) I and III C) All of the above.arrow_forward
- What is meant by the term “intermediate fossil” when referring to the fossil record?arrow_forwardWhy do we need to know the age of a fossil?arrow_forwardWhen a radio-isotope in a fossil with a half-life of 4,000 years has been reduced to 25% of its original amount, how old is the fossil?arrow_forward
- How do we know how old a fossil is? A) We compare it to current species and see how much has changed B) We see how much soil is on top of it C) We use radiometric datingarrow_forwardDescribe six types of fossils and how they form. What presentenvironmental conditions might preserve today’s organisms to formthe fossils of the future?arrow_forwardWhich of the following is NOT true for relative dating methods: A. Relies on observational skills B. Includes stratigraphy which is based on ordered layers that build up over time C. Determines if one artifact or fossil is older than another D. Gives you specific dates of the artifact or fossilarrow_forward
- What types of information are used to hypothesize how species arerelated to one another by descent from a shared ancestor? Give anexample of how multiple types of evidence can support one another.arrow_forwardExplain how phylogenetic trees are interpreted and created. Explain what types of traitsare used and some of the difficulties associated with reconstructing phylogenetichistories.arrow_forwardWhat is the difference between a phylogenetic tree and a cladogram? What the difference between "homologous traits" and "analogous traits"? What is the difference between "ancestral traits" and "derived traits"?arrow_forward
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