Campbell Biology, Volume 1 - With Access (Custom)
2nd Edition
ISBN: 9781323170106
Author: Reece
Publisher: PEARSON
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Chapter 22.3, Problem 3CC
Summary Introduction
To predict: Whether the geographical distribution of fossils of early dinosaurs originated 200-250 million years ago would be broad or narrow.
Concept introduction:
Dinosaurs originated when there was a single large landmass in the Earth, called Pangea.
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Chapter 22 Solutions
Campbell Biology, Volume 1 - With Access (Custom)
Ch. 22.1 - How did Hutton's and Lyell's ideas influence...Ch. 22.1 - MAKE CONNECTIONS Scientific hypotheses must be...Ch. 22.2 - How does the concept of descent with modification...Ch. 22.2 - WHAT IF? If you discovered a fossil of an extinct...Ch. 22.2 - Prob. 3CCCh. 22.3 - Explain how the following Statement is inaccurate:...Ch. 22.3 - How does evolution account for (a) the similar...Ch. 22.3 - Prob. 3CCCh. 22 - Why was the age of Barth important for Darwin's...Ch. 22 - Describe how overreproduction and heritable...
Ch. 22 - Summarize the different lines of evidence...Ch. 22 - Level 1: Knowledge/Comprehension 1. Which of the...Ch. 22 - Which of the following observations helped Darwin...Ch. 22 - Prob. 3TYUCh. 22 - Prob. 4TYUCh. 22 - DNA sequences in manv human genes are very similar...Ch. 22 - EVOLUTION CONNECTION Explain why anatomical and...Ch. 22 - SCIENTIFIC INQUIRY DRAW IT Mosquitoes resistant...Ch. 22 - WRITE ABOUT A THEME: INTERACTIONS Write a Short...Ch. 22 - SYNTHESIZE YOUR KNOWLEDGE This honeypot ant (genus...
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- Fossils show that dinosaurs originated between 200 and 250 million years ago. Would you expect the geographic distribution of early dinosaur fossils to be on multiple continents or on a single continent? Explain. Hint: refer to continental drift in your explanation.arrow_forwardWHAT IF? Suppose a molecular clock dates the divergence of two taxa at 80 million years ago, but new fossilevidence shows that the taxa diverged at least 120 millionyears ago. Explain how this could happen.arrow_forwardWhAt 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_forward
- WHAT 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_forwardA number of scientists believe that the Permian extinction was caused by huge volcanic lava flows (from the Siberian traps) that may have caused low oxygen concentrations compared to the high oxygen levels in the Permian. Does this low oxygen level after the Permian extinction make it likely that dinosaurs, especially large ones, did not evolve immediately after the Permian extinction (252 million years ago)? Why or why not?arrow_forwardhow did the K-Pg (aka Cretaceous–Paleogene) mass extinction gave new ecological opportunities to mammals leading to adaptive radiation?arrow_forward
- Explain at least one reasonable hypothesis about what caused the extinction of the dinosaurs at theK–T extinction (abbreviation of Cretaceous–Tertiary extinction) also called the K–Pg extinction or Cretaceous–Paleogene extinction event about 66 million years ago.arrow_forwardMAKE 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_forwardImagine that you have the DNA sequences fromthe intron of a gene in three species called A, B,and C. Species A and B are most closely related,while C is more distantly related. The sequencesof A and B differ by 18 base pairs, A and C differby 26 base pairs, and B and C differ by 28 basepairs. Fossils show that species A and B divergedabout 1.2 Mya, but there is no fossil evidence asto when the most recent common ancestor ofall three species lived. Use the genetic data toestimate that date. What assumptions are youmaking to get this estimate?arrow_forward
- If you discovered a fossil of an extinct mammal thatlived high in the Andes, would you predict that it wouldbe more closely resemble present-day mammals fromSouth American jungles or present-day mammals thatlive high in African mountains? Explain.arrow_forward\. Read some papers (find them using any of several literature-search engines that your instructor can suggest) that make different estimates of the timing of either the origin of bilaterian animal phyla or the orders of mammals. How different are the estimates based on molecular clock evidence versus paleontological evidence? What might account for these differences, and how might they be resolved?arrow_forwardIf you as a paleoanthropologist are plannin an excavation at a hominin site in East Africa which is dated to about 2 million years old, which fossil hominin species might you expect to find?arrow_forward
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