Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 19.3, Problem 3CC
WHAT IF? Fossils show that dinosaurs originated between 200 and 250 million years ago. Would you expect the geographic distribution of early dinosaur fossils to be broad (on many continents) or narrow (on one or a few continents only)? Explain.
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Chapter 19 Solutions
Campbell Biology in Focus
Ch. 19.1 - How did Huttons and Lyells ideas influence Darwins...Ch. 19.1 - MAKE CONNECTIONS Scientific hypotheses must be...Ch. 19.2 - How does the concept of descent with modification...Ch. 19.2 - Prob. 2CCCh. 19.2 - MAKE CONNECTIONS Review the relationship between...Ch. 19.3 - Explain how the following statement is inaccurate:...Ch. 19.3 - How does evolution account for (a) the similar...Ch. 19.3 - WHAT IF? Fossils show that dinosaurs originated...Ch. 19 - Which of the following is not an observation or...Ch. 19 - Which of the following observations helped Darwin...
Ch. 19 - Prob. 3TYUCh. 19 - The upper forelimbs of humans and bats have fairly...Ch. 19 - DNA sequences In many human genes are very similar...Ch. 19 - SCIENTIFIC INQUIRY DRAW IT Mosquitoes resistant to...Ch. 19 - FOCUS ON EVOLUTION Explain why anatomical and...Ch. 19 - FOCUS ON INTERACTIONS Write a short essay (about...Ch. 19 - SYNTHESIZE YOUR KNOWLEDGE This honeypot ant (genus...
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- WhAt IF? Your measurements indicate that a fossilizedskull you unearthed has a carbon-14/carbon-12 ratio about1⁄16 that of the skulls of present-day animals. What is theapproximate age of the fossilized skull?arrow_forwardWHAT IF? If you discovered a fossil of an extinct mammal that lived high in the Andes, would you predict thatit would more closely resemble present-day mammalsfrom South American jungles or present-day mammalsthat live high in Asian mountains? Explain.arrow_forwardWHAT IF? What would a fossil record of life todaylook like?arrow_forward
- MAKE CONNECTIONS Develop a hypothesis to explainwhy the diversity of mammals increased in the Cenozoic.Your explanation should consider mammalian adaptations as well as factors such as mass extinctions andcontinental drift (review Concept 25.4).arrow_forward. WHAT IF? Imagine that we could replay the history oflife. Is it possible that a group of vertebrates that colonized land could have arisen from aquatic gnathostomesother than the lobe-fins? Explain.arrow_forwardWHAT IF? Neanderthal fossils have been found only in Europe and theMiddle East. Explain how Neanderthals could be more similar genetically tonon-Africans than to Africans and yet be equally close to humans from France,China, and Papua New Guineaarrow_forward
- Carbon-14 dating works for fossils up to about 75,000 years old;fossils older than that contain too little 14C to be detected. Mostdinosaurs went extinct 65.5 million years ago. (a) Can 14C be usedto date dinosaur bones? Explain. (b) Radioactive uranium-235 hasa half-life of 704 million years. If it was incorporated into dinosaurbones, could it be used to date the dinosaur fossils? Explainarrow_forwardTest Your Understanding Apply and Analyze 9. In interpreting a cladogram, (a) we can identify the specific ancestor of each taxon by tracing each branch back to the node closest to the root (b) taxa on the right side of a cladogram have evolved from the taxa on the left side (c) the relative placement of smaller branches allows us to determine the number of years since a particular taxon has evolved (d) we can determine relationships by tracing along the branches back to the most recent common ancestor (e) we must first identify horizontal gene transferarrow_forwardWHAT IF? The insect Drosophila melanogaster andthe nematode Caenorhabditis elegans are prominentmodel organisms. Are these species the most appropriateinvertebrates for making inferences about humans andother vertebrates? Explain.arrow_forward
- Thinking Critically When did the first true animals evolve? What atmospheric changes had to happen before animal life was possible? Are descendants of most of the early forms of animal life represented in the ocean today? Explain why.arrow_forwardTest Your Understanding 8.VISUALIZE Draw a simple cladogram illustrating the evolutionary relationships among extant mammals (marsupials, eutherians, and monotremes). Include the following characters in your cladogram: well-developed placenta, vivipary, endothermy, marsupium, hair.arrow_forwardinner fish 1. Why is it important (or interesting) to find transitional fossils? 2. What are the different lines of evidence that point to a shared ancestry among ourselves and other vertebrates? Invertebrates? 3. What processes (evolutionary, developmental, other) result in the changes in animal type the answer Write clear answers. not from quizletarrow_forward
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