Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 13, Problem 4WIO
The bubonic plague swept through western Europe in 1348. Suppose researchers use 14C dating on the skeletons of suspected plague victims, and they discover that about 50% of the original amount of 14C remains in the bones. Are the bones the remains of plague victims?
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Why are human and chimpanzee DNA 96 percent similar? Please choose the best option.a) Both groups show similarities in their fossil record.b) Humans and chimpanzees share several similar traits such as the use of tools.c) These two species descended from a recent common ancestor.d) Natural selection has favored those particular genes in both humans and chimpanzees.
Astronomers have made great strides in sending probes out to other planets and moons in our solar system. If they were to find a living creature some place other than Earth, how could DNA analysis help them better understand the organism? Explain in 1–2 sentences
According to "Our Earliest Ancestors", why can’t scientists just do DNA analysis on these fossil hominins to determine if they are a separate species and possibly what species they belong to?
A.The technology for extracting DNA from fossils hasn't been developed yet.
B.Scientists can't perform DNA analysis on fossil hominins because the fossils have been contaminated with modern human DNA over the years, making it impossible to isolate the ancient genetic material.
C.The fossils would need to be in a -5 degree Celsius environment to prevent DNA from degrading
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Chapter 13 Solutions
Biology: Concepts and Investigations
Ch. 13.1 - What is the geologic timescale?Ch. 13.1 - What types of information provide the clues that...Ch. 13.2 - What are some of the ways that fossils form?Ch. 13.2 - Why will the fossil record always be incomplete?Ch. 13.2 - Prob. 3MCCh. 13.2 - Distinguish between relative and absolute dating...Ch. 13.2 - How does radiometric dating work?Ch. 13.3 - How have the positions of Earths continents...Ch. 13.3 - Prob. 2MCCh. 13.4 - What can homologous structures reveal about...
Ch. 13.4 - What is a vestigial structure? What are some...Ch. 13.4 - What is convergent evolution?Ch. 13.5 - How does the study of embryonic development reveal...Ch. 13.5 - Prob. 2MCCh. 13.6 - How does analysis of DNA and proteins support...Ch. 13.6 - Prob. 2MCCh. 13.6 - How can molecular clocks help determine when two...Ch. 13.7 - How might the ability to crawl on land for short...Ch. 13.7 - Prob. 2MCCh. 13 - You discover that a 24,000-year-old fossil has one...Ch. 13 - In fossils found in deeper layers of the Earth,...Ch. 13 - Prob. 3MCQCh. 13 - Ground beetles (Carabus solieri) have useless hind...Ch. 13 - Prob. 5MCQCh. 13 - Prob. 6MCQCh. 13 - Explain the significance of the geologic timescale...Ch. 13 - Prob. 2WIOCh. 13 - Describe six types of fossils and how they form....Ch. 13 - The bubonic plague swept through western Europe in...Ch. 13 - Index fossils represent organisms that were...Ch. 13 - Prob. 6WIOCh. 13 - Prob. 7WIOCh. 13 - Prob. 8WIOCh. 13 - How do biologists use sequences of proteins and...Ch. 13 - Prob. 10WIOCh. 13 - Figure 13.25 Pull It Together: Evidence of...Ch. 13 - Prob. 2PITCh. 13 - Refer to figure 13.25 and the chapter content to...
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- "Carbon 14 decays to carbon12. The half-life of the C14 isotope is 5730 years. 22920 years after an animal dies, ______ carbon 14 will have been replaced with carbon12 and only _____ will remain in a bone sample from the animals skeleton found by the archaeologists. " "More than 99 percent, less than 1 percent" "Three fourths (75 percent), one fourth (25 percent)" "15/16ths (94 percent), 1/16 (6 percent)" "62/64ths (97 percent), 2/64 (3 percent)"arrow_forwardAccording to "Our Earliest Ancestors", why can’t scientists just do DNA analysis on these fossil hominins to determine if they are a separate species and possibly what species they belong to? A.The fossils would need to be in a -5 degree Celsius environment to prevent DNA from degrading B.The DNA of fossil hominins is too similar to modern humans, making it difficult to distinguish between them. C.Scientists can't perform DNA analysis on fossil hominins because the fossils have been contaminated with modern human DNA over the years, making it impossible to isolate the ancient genetic material. D.The technology for extracting DNA from fossils hasn't been developed yetarrow_forwardUsing evidence from the text, what factors influenced the survival of humans during the bubonic plague? Please explain in 1 to 2 sentences STOP COPYING FROM THE INTERNET USE EVIDENCE FROM THE TEXT!!!arrow_forward
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