Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 14, Problem 14PS
Interpreting Data The carbon-14/carbon-12 ratio of a fossilized skull is about 6.25% of that of the skull of a present-day animal. Using the graph below, what is the approximate age of the fossil?
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Chapter 14 Solutions
Campbell Essential Biology (7th Edition)
Ch. 14 - Distinguish between microevolution, speciation,...Ch. 14 - Identify each of the following reproductive...Ch. 14 - Why is a small, isolated population more likely to...Ch. 14 - Many species of plants and animals adapted to...Ch. 14 - Mass extinctions a. cut the number of species to...Ch. 14 - Prob. 6SQCh. 14 - A paleontologist estimates that when a particular...Ch. 14 - Why are biologists careful to distinguish...Ch. 14 - In the three-domain system, which two domains...Ch. 14 - Prob. 10IMT
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- Imagine you were to find a fossilized animal bone containing one-eighth the amount of carbon-14 present in earth’s atmosphere today. How long ago did the animal die?arrow_forwardHow would the evolution of teeth and bones composed of calcite or aragonite, instead of dahllite, have changed the lifestyles of some vertebrates? Give some specific examples using both fossil and present-day animals. typed answer onlyarrow_forwardUse the scenario to answer the question. A fossil indicates that whales might have started out as small land mammals. This animal was about the size of a wolf and had a diet of meat and fish. While the fossil has the body of a land animal, its head is shaped like a whale with an ear bone that is unique to whales. Which statement is likely true about the fossil? It is not a transitional fossil, but it shows correlation. It is not a transitional fossil, but it shows causation. It is a transitional fossil that shows causation. It is a transitional fossil that shows correlation.arrow_forward
- Imagine you were asked to excavate fossils from deposits near the top of the Grand Canyon and near the bottom . Predict any pattern you would expect to find in the fossilsarrow_forwardTrue or false? Wrinkly textures in rock that formed from ancient biofilms living in marine sediments are considered trace fossils.arrow_forwardThe researchers found that the Neanderthal fossil had approximately0.0078 as much 14C as found originally in the atmosphere. (a) Usingthe numbers on your graph, determine how many half-lives havepassed since the Neanderthal died. (b) Using your 14C calibration onthe x-axis, what is the approximate age of the Neanderthal fossil inyears (round off to the nearest thousand)? (c) Approximately whendid Neanderthals become extinct according to this study? (d) Theresearchers cite evidence that modern humans (H. sapiens) becameestablished in the same region as the last Neanderthals approximately 39,000–42,000 years ago. What does this suggest aboutthe overlap of Neanderthals and modern humans?arrow_forward
- True or false? Fossils can be body parts of ancient organisms such as bones,shells,teeth or plant leavesarrow_forwardWhich statement is true? Recent remains of plants or animals on topsoil are fossils. Imprints of leaves or footprints in sedimentary rock are fossils. Insects preserved in hardened tree sap are not fossils. Petrified skeletal bones from an ancient mammal are not fossilsarrow_forwardtrue or false? fossils can tell us which organisms live in the past.arrow_forward
- Geology and the Geological Time Chart. Using the Geological Time Chart. answer the following questions. __________________ After the Cretaceous/Tertiary extinction, what group of animals started to diversify? __________________ During which era did the first animals with backbones become evident? __________________ During which period did the first mammals become evident? __________________ Did flowering plants exist during when the dinosaurs first appeared? What would you say to someone who told you they have a fossilized rabbit skeleton that was from the Carboniferous period?arrow_forwardConsider three important fossil SITES in Canada. Name them. Put them in order from the oldest to the youngest. For each site, provide one phrase that captures the significance of the site.arrow_forwardFossil A found closer to the surface compared to Fossil B. Which of the following conclusions can be made based on this statement?arrow_forward
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