Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
6th Edition
ISBN: 9780134555430
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 11, Problem 2LTB
Summary Introduction
Introduction:
The determination of the date when an ancient organism lived can be estimated through the age of the rocks. Radiometric dating depends on radioactive decay, as the rocks spontaneously break down into different unique elements as daughter products.
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Radiometric dating uses the decay of to to determine how old fossils of biological material are using the rate of decay.
Group of answer choices
14C, 12C
14N, 12C
12C, 14N
14C, 14N
A scientist has a fossil that was found in a layer of rock close to Earth’s surface. He believes that the fossil is around 12,000 years old.
Which method would best allow the scientist to confirm the actual age of the fossil?
finding another fossil in a deeper layer of rock
finding another fossil in the same layer of rock
using carbon/nitrogen absolute dating
using potassium/argon absolute dating
Explain why it is difficult to use carbon-14 dating on 100-million-year-old dinosaur fossils
Chapter 11 Solutions
Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
Ch. 11 - What observations did Darwin make on the Galapagos...Ch. 11 - Prob. 2LTBCh. 11 - Prob. 3LTBCh. 11 - In science, a theory is a(n) ___________. educated...Ch. 11 - The theory of common descent states that all modem...Ch. 11 - Prob. 6LTBCh. 11 - Prob. 7LTBCh. 11 - Even though marsupial mammals give birth to live...Ch. 11 - Prob. 9LTBCh. 11 - Which of the following taxonomic levels contains...
Ch. 11 - Prob. 1AAATBCh. 11 - DNA is not the only molecule that is used to test...Ch. 11 - Look at the tree you generated for question 2. It...Ch. 11 - Search for the biology learning standards...Ch. 11 - Humans and chimpanzees are more similar to each...Ch. 11 - The science that you learned in this chapter has...
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- True or false? Wrinkly textures in rock that formed from ancient biofilms living in marine sediments are considered trace fossils.arrow_forwardIn radiometric dating, scientists use the half-life of a radioactive isotope, to determine the approximate age of rocks, and the fossils that are embedded in them. Half-life is the time it takes for half of a radioactive element to become stable.Uranium 238 (238U) is a radioactive element that decays into Lead (206Pb) after 4.5 billion years. 6) Scientists found a fossil in a layer of rock that tested as 1/8th U and 7/8th Pb. What is the approximate age of the fossil? A) 562 million years old B) 4.5 billion years old C) 9 billion years old D) 13.5 billion years old Not Gradedarrow_forwardRadiometric dating measures the decay of radioactive isotopes present in layers where fossils are found. True Falsearrow_forward
- The fossils in line 4 are blank the ones in line 1 of the diagram. A) much older B) much younger than C) slightly older than D) slightly younger thanarrow_forwardGive 1 reason from the reading that shows that there are no life forms on Venus.arrow_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
- Why is it so important to learn about the Piltdown Hoax? Do you think it demonstrates that scientists may lose their objectivity when they want data to fulfill their expectations and desires or does it demonstrate the self-corrective nature of science? Why were people so willing to believethat one of the oldest specimens was found in south England?arrow_forwardResearchers 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_forwardFact or theory? Organisms that look similar have been observed to have differences when preserved in rocks of different ages.arrow_forward
- Organism A lived from 410 to 60 million years ago. Organism B lived from 200 to 100 million years ago. Which organism will be the better index fossil? (1)arrow_forwardWhich statement about spontaneous generation is false? A. It addresses the formation of living cells from previously nonliving material. B. This was a common belief for during the Middle Ages. C. Pasteur demonstrated that it does not occur under normal laboratory conditions. D. It occurs every time a new species evolves from a preexisting species. E. It apparently occurred at least once – when life on Earth began.arrow_forwardLOOK AND ANALYZE AT THE ILLUSTRATION. THE ANSWER WILL BASED ON THE ILLUSTRATION For how long has there been life on Earth? For what percentage of time has life existed on Earth? For about how many years of geological time have human existed on earth?arrow_forward
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