BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Textbook Question
Chapter 16, Problem 6SA
True or false? Wrinkly textures in rock that formed from ancient biofilms living in marine sediments are considered trace fossils.
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Chapter 16 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 16 - The number of species on an island usually depends...Ch. 16 - The bones of a birds wing are similar to the bones...Ch. 16 - Evolution _______ natural selection. a. is the...Ch. 16 - A trait is adaptive if it _______. a. arises by...Ch. 16 - In which type of rock are you more likely to find...Ch. 16 - True or false? Wrinkly textures in rock that...Ch. 16 - If the half-life of a radioisotope is 20,000...Ch. 16 - Did Pangea or Gondwana form first?Ch. 16 - Forces that cause geological change do not include...Ch. 16 - Through _______, a body part of an ancestor is...
Ch. 16 - Prob. 11SACh. 16 - A mutation that alters the embryonic expression...Ch. 16 - The last dinosaurs died _______ million years ago.Ch. 16 - All of the following data types can be used as...Ch. 16 - Match the terms with the most suitable...Ch. 16 - Prob. 1CTCh. 16 - If you think of geologic time spans as minutes,...
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- The most useful method for dating ancient calcium rich cave deposits would be Group of answer choices A: Argon-Argon Dating B: Paleomagnetic Reversals C: Electron Spin Resonance Dating D: Uranium-Thorium Dating E: Potassium-Argon Datingarrow_forwardRadiometric dating _______. has a substantial error factor can only be used for dating animal fossils can be used to date sedimentary rock, but not fossils is basedon the premise that each isotope decays at a constant rate is unpredictable because of changes in temperature and pressurearrow_forwardRadiometric dating measures the decay of radioactive isotopes present in layers where fossils are found. True Falsearrow_forward
- Researchers looking for fossils of the earliest life forms face many hurdles. For example, few sedimentary rocks date back more than 3 billion years. Explain why so few remaining samples of these early rocks remain.arrow_forwardA paleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive isotope potassium-40. The rock now contains 3 mg of potassium-40. The half-life of potassium-40 is 1.3 billion years. From this information, you can conclude that the rock is approximately ______________ billion years old.arrow_forwardDescribe the roles that montmorillonite clay and vesicles may haveplayed in the origin of life.arrow_forward
- Researchers looking for fossils of the earliest life-forms face many hurdles. Explain why sofew remaining samples of these rocks remain.arrow_forwardFigure 5 illustrates the distribution of fossils in undisturbed layers of silt at the bottom of the ocean. Which statement is true based on Figure 5? Figure 5 Ocean Layer A Layer B Layer Carrow_forwardRadiometric decay of carbon-14 would be used in dating sedimentary rock. a trace fossil. an insect in amber. a fossil imprint. igneous rock.arrow_forward
- Which 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_forwardIn the shale unit, you find the following fossil: What is the mode of preservation of this fossil? Recrystallization Internal mold Replacement External mold Carbonizationarrow_forwardVolcanic ash can be used to date fossil finds because each time it is expelled by an eruption it has the same relative proportions of radioactive isotopes. True or Falsearrow_forward
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