Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
4th Edition
ISBN: 9781259853197
Author: Robert Brooker
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 22, Problem 2CQ
Summary Introduction
To determine: The age of fossils by explaining the concepts of radiometric dating and half-life and the types of rocks analyzed.
Introduction: Sedimentary rocks are formed from particles of older rocks broken apart by water or wind. The particles may be in the form of gravel, sand or mud. These particles subsequently settle and bury the living and dead organisms at the bottom of rivers, lakes and oceans. Eventually, the sediments at the bottom of the pile become rock.
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Chapter 22 Solutions
Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
Ch. 22.1 - Prob. 1CCCh. 22.1 - Prob. 2CCCh. 22.1 - Prob. 3CCCh. 22.1 - Look back at Figure 3.11. What is the...Ch. 22.1 - Prob. 4CCCh. 22.1 - Prob. 1EQCh. 22.1 - Prob. 2EQCh. 22.1 - Prob. 3EQCh. 22.2 - Prob. 1CCCh. 22.2 - Prob. 2CC
Ch. 22.3 - Prob. 1BCCh. 22.3 - Prob. 1CCCh. 22.3 - Prob. 2BCCh. 22 - Prob. 1TYCh. 22 - Prob. 2TYCh. 22 - Prob. 3TYCh. 22 - Prob. 4TYCh. 22 - Prob. 5TYCh. 22 - Prob. 6TYCh. 22 - The endosymbiosis hypothesis explaining the...Ch. 22 - Which of the following explanations of...Ch. 22 - Prob. 9TYCh. 22 - Which of the following statements regarding modern...Ch. 22 - Prob. 1CQCh. 22 - Prob. 2CQCh. 22 - Core Concept: Evolution Describe two examples in...Ch. 22 - Prob. 1COQCh. 22 - Prob. 2COQ
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- In 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_forwardUsing radioactive isotopes to determine the age of a fossil is known as radiometric dating. How might radiometric dating provide support for the theory of evolution by natural selection? Hint—Consider the age of fossils with respect to the overall fossil record (the entire collection of data regarding fossils and the age of Earth). “Navy coffee” is where the coffee is brewed strong and a bit of salt is added. What is special about water that allows you to put sugar or salt in your coffee? To help answer this question, consider the opposite situation: Why do salt scrubs that you buy in a high-end spa consist of large salt crystals in oil?arrow_forwardIn which type of rock are you more likely to find a fossil? a. basalt, a dark, fine-grained volcanic rock b. limestone, composed of calcium carbonate sediments c. slate, a volcanic melted and cooled shale d. granite, which forms by crystallization of molten rock below the surface of the Eartharrow_forward
- What are the challenges of estimating the ages of old fossils?Explain how these challenges may be overcome in somecircumstances.arrow_forwardWhat you mean by living fossils?arrow_forwardOrganism 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_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_forwardWhat is one way we can determine the age of fossils? * Adaptive Dating Structural Dating Geometric Dating Radioactive Dating Lenovo esc & 3 4 5 tab m shiftarrow_forward1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 29 27 28 30 330 29 29 30 Based on the given figure, answer the following questions (Note: BYA=Billion Years ago; MYA= Million years ago) The oldest eukaryote might be dated back to? Each day represents how many years? When did the first prokaryotic fossil exist? When did photosynthesis first emerged? The multicellular organisms appeared? ~1.5 BYA ~2.5 BYA ~10 BYA ~3.5 BYA ~150 MY ~50 MY ~1 MY ~4.5 MYA ~ 10 MYA ~1 BYAarrow_forward
- Using radioactive isotopes to determine the age of a fossil is known as radiometric dating. How might radiometric dating provide support for the theory of evolution by natural selection? Hint—Consider the age of fossils with respect to the overall fossil record (the entire collection of data regarding fossils and the age of Earth).arrow_forwardWhich of the following is an accurate point that supports the idea that the earliest protocells relied first on RNA (not DNA) as inherited information? A. RNA is composed of lipids, and lipids were present on early Earth before the nucleotides that compose DNA were B. RNA is a monomer (unlike DNA), so it is simpler and more likely to have been used by these simple protocells C. DNA would have been too large to fit into the small protocells, but RNA was small enough to fit D. RNA can serve dual roles as both genetic information storage and an enzyme (but DNA cannot do both) ..arrow_forwardA 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 datingarrow_forward
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