
Concept explainers
Introduction:
A fossil is any preserved evidence of an organism. Radiometric dating is used to measure the age of a rock. It uses the decay of radioactive isotopes to measure the age of a rock. The method requires that the half-life of the isotope is known. The relative amounts of a radioactive isotope and its decay product must also be known.

Answer to Problem 4A
Correct answer:
The correct answer is option C. 11,460 years old
Explanation of Solution
Explanation/justification for the correct answer:
Option C. 11,460 years old −According to the given data carbon- 14 has a half-life of 5730 years. It is given that one- fourth of the original radioactive carbon is present in the fossil.
So after 5730 years half of the original radioactive carbon is present in the fossil. After another 5730 years, one- fourth of the original radioactive carbon will be present in the fossil.
Hence age of the fossil= 5730 + 5730= 11, 460 years.
Hence this is the correct option.
Explanation for incorrect answer:
Option A. 2857.5 years old- According to the given data carbon- 14 has a half-life of 5730 years and one-fourth of the original radioactive carbon is present in the fossil.
The age of the fossil cannot be less than the half-life of carbon.
Hence this is not the correct option.
Option B. 5730 years old- According to the given data carbon- 14 has a half-life of 5730 years and one-fourth of the original radioactive carbon is present in the fossil.
After 5730 years half of the original radioactive carbon will be present in the fossil. So the age of the fossil has to be more than the half-life of carbon as one- fourth of the original radioactive carbon is present in the fossil.
Hence this is not the correct option.
Option D. 17,145 years old− According to the given data carbon- 14 has a half-life of 5730 years and one-fourth of the original radioactive carbon is present in the fossil.
So after 5730 years half of the original radioactive carbon is present in the fossil. After another 5730 years, one- fourth of the original radioactive carbon will be present in the fossil.
Hence, age of fossil= 5730 + 5730= 11, 460 years.
Hence, this is not the correct option.
Chapter 14 Solutions
Biology Illinois Edition (Glencoe Science)
Additional Science Textbook Solutions
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
Campbell Biology (11th Edition)
Anatomy & Physiology (6th Edition)
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
Human Physiology: An Integrated Approach (8th Edition)
- There is a species of eagle, which lives in a tropical forest in Brazil. The alula pattern of its wings is determined by a single autosomal gene with four alleles that exhibit an unknown hierarchy of dominance. Genetic testing shows that individuals 1-1, 11-4, 11-7, III-1, and III-4 are each homozygous. How many possible genotypes among checkered eagles in the population?arrow_forwardwhat is this called?arrow_forwardcan you help me identify this it's based on onion rootarrow_forward
- Which evidence-based stress management techniques are most effective in reducing chronic stress and supporting college students’ academic success?arrow_forwardstudents in a science class investiged the conditions under which corn seeds would germinate most successfully. BAsed on the results which of these factors appears most important for successful corn seed germination.arrow_forwardI want to write the given physician orders in the kardex formarrow_forward
- Amino Acid Coclow TABle 3' Gly Phe Leu (G) (F) (L) 3- Val (V) Arg (R) Ser (S) Ala (A) Lys (K) CAG G Glu Asp (E) (D) Ser (S) CCCAGUCAGUCAGUCAG 0204 C U A G C Asn (N) G 4 A AGU C GU (5) AC C UGA A G5 C CUGACUGACUGACUGAC Thr (T) Met (M) lle £€ (1) U 4 G Tyr Σε (Y) U Cys (C) C A G Trp (W) 3' U C A Leu בוט His Pro (P) ££ (H) Gin (Q) Arg 흐름 (R) (L) Start Stop 8. Transcription and Translation Practice: (Video 10-1 and 10-2) A. Below is the sense strand of a DNA gene. Using the sense strand, create the antisense DNA strand and label the 5' and 3' ends. B. Use the antisense strand that you create in part A as a template to create the mRNA transcript of the gene and label the 5' and 3' ends. C. Translate the mRNA you produced in part B into the polypeptide sequence making sure to follow all the rules of translation. 5'-AGCATGACTAATAGTTGTTGAGCTGTC-3' (sense strand) 4arrow_forwardWhat is the structure and function of Eukaryotic cells, including their organelles? How are Eukaryotic cells different than Prokaryotic cells, in terms of evolution which form of the cell might have came first? How do Eukaryotic cells become malignant (cancerous)?arrow_forwardWhat are the roles of DNA and proteins inside of the cell? What are the building blocks or molecular components of the DNA and proteins? How are proteins produced within the cell? What connection is there between DNA, proteins, and the cell cycle? What is the relationship between DNA, proteins, and Cancer?arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education





