Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 24, Problem 14PIAT
Svante Pääbo and colleagues sequenced the Neanderthal genome from fossils and compared the sequences to modem humans. According to the data shown here, did the two species interbreed when they overlapped in Europe? Explain.
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Chapter 24 Solutions
Biological Science (7th Edition)
Ch. 24 - 1. What distinguishes a morphospecies?
a. It has...Ch. 24 - 2. Which of the following describes vicariance?
a....Ch. 24 - Prob. 3TYKCh. 24 - 6. Sexual selection favors individuals with traits...Ch. 24 - 7. QUANTITATIVE If one species (2n = 10) crosses...Ch. 24 - Prob. 10TYPSSCh. 24 - Prob. 11PIATCh. 24 - 12. Before the application of DNA sequencing to...Ch. 24 - Svante Pääbo and colleagues sequenced the...
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- Assuming the Denisovans, Neanderthals, and humans were able to interbreed, what does this tell you about their species status according to the biological species concept?arrow_forwardThe Out of Africa hypothesis (also called the African Replacement hypothesis) proposes that Homo sapiens arose in Africa and evolved there for several hundred thousand years. Then, some 85,000 years ago, a small band of Homo sapiens migrated out of Africa and populated the remainder of the world. Based on this hypothesis, what predictions would you make about worldwide human variation in mtDNA?arrow_forwardA group of researchers are trying to determine the relationship between various groups of organisms. The researchers analyze the amino acid sequence of the protein cytochrome c in various groups of organisms. Once they sequence cytochrome c in all organisms, they determine the number of amino acid substitutions in each group. The results can be seen in the graph below, which plots the data with respect to the time since the divergence of the members of paired groups from a common ancestor. A B mammals and reptiles с Number of Amino Acid Substitutions (per 100 amino acids) in Cytochrome, c D 60- 50+ 40+ 30- 20+ 10+ 0 0 O birds and reptiles A graph showing when various groups of organisms diverged from a common ancestor Based on the graph above, can you conclude which of the following organisms are most distantly related? 200 400 600 800 1,000 Time Since Divergence from a Common Ancestor (millions of years) fish and land vertebrates mammals and reptiles birds and mammals insects and…arrow_forward
- How does the fact that all ethnic groups except Africans contain some Neanderthal DNA (1–4 percent of their DNA) support the out-of-Africa hypothesis for the origin of modern humans (Homo sapiens)?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 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 D.The DNA of fossil hominins is too similar to modern humans, making it difficult to distinguish between them.arrow_forwardAccording to "The Complex Evolution of Homo sapiens", what is the significance of the L3 gene and who was the L3 woman? A.Only individuals within North and South America descended from the L3 woman. B.All individuals within Africa are descended from the L3 woman. C.All individuals outside of Africa and who live in the Old World are descended from the L3 woman. D.All individuals outside of Africa are descended from the L3 womanarrow_forward
- 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.arrow_forwardWhich statement is true about the Neanderthals? O A. They originated around the same time period as homo sapiens and coexisted O B. Homo sapiens rapidly killed off all the Neanderthals as they had superior fighting technology like the bow and arrow and spears O C. Neanderthals interbred with Homo sapiens and as a result assimilated with Homo sapiens O D. They were only living in Europe where they had genes allowing them to acclimate to that particular environment. OE. Neaderthals were the likely direct ancestors of the newly discovered pigmy island species of humans, H. floresiensis and H. luzonensisarrow_forwardAccording to "Homo naledi – New Questions on Human Evolution ", why was it significant that the bones were found to be articulated (their bones hadn’t separated from each other)? A.The individuals arrived in the cave either alive or shortly after the died. B.The individuals had decomposed outside of the cave, and other Homo naledi individuals put their skeletons together inside the cave. C.The bodies must have been placed in bags or coffins to keep the skeleton together as the body degraded. D.None of these are correctarrow_forward
- According to " Denisovans: Decoding the Secrets of Our Mysterious Ancient Cousins”, what is the most likely reason that the Denisovans became extinct? A.Woolly mammoths expanded into the territories that Denisovans lived, and used up the food and land resources in that area. B.Homo sapiens expanded into the territories that Denisovans lived, and used up the food and land resources in that area. C.Homo sapiens expanded into the territories that Denisovans lived, and killed off the Denisovans. D.Predators expanded into the territories that Denisovans lived, and they killed off the Denisovans.arrow_forwardCrickets have colonized each island in the Hawaiian Archipelago. Geological data indicates that Kauai is the oldest island in the chain and Hawaii is the youngest. Researchers hypothesized that crickets sequentially colonized islands as they rose out of the ocean and created a cladogram based on molecular relationships to test this idea. 3) Which islands unambiguously show multiple independent colonization events? 4) How many colonization events were there on each of the islands showing multiple events?arrow_forwardA fossil believed to be the most recent common ancestor between housecats and lions is radio-dated to about 11 million years ago (mya). An analysis of a neutral section of mitochondrial DNA in both species finds 15 DNA base pair differences between the two cats today. Meanwhile, an analysis of housecats and pumas shows 4 DNA base pair differences between them, which are believed to have diverged around 3 mya. Using this data, what is the best estimate of the time since divergence of housecats and lynx, which have 11 DNA base pair differences in this mitochondrial DNA region? 5 mya O6 mya O 7 mya O8 mya 9 myaarrow_forward
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