What theory about the evolution of humans did the mitochondrial phylogeny study provide evidence for? That Neanderthals genes moved into Africa via gene flow. That our ancestors descend from a population in East Africa that expanded globally relatively recently. That Homo erectus was a human ancestor. That skin color varies due to multiple evolutionary changes during human migration.

What theory about the evolution of humans did the mitochondrial phylogeny study provide evidence for? That Neanderthals genes moved into Africa via gene flow. That our ancestors descend from a population in East Africa that expanded globally relatively recently. That Homo erectus was a human ancestor. That skin color varies due to multiple evolutionary changes during human migration.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter32: Deuterostomes: Vertebrates And Their Closest Relatives

Section: Chapter Questions

Problem 1ITD: The phylogenetic tree for vertebrates depicted below was constructed from sequence data for two rRNA...

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Some genetic studies suggest that the most recent common ancestor of Homo sapiens that lived outside of Africa spread from Africa about 50,000years ago. Compare this date to the dates of the fossil record. Can both the genetic results and the dates ascribe to the fossils be correct? Justify.
Neanderthals are recognizably human but have distinctive facial features and a stocky build that were evolutionary adaptations to cold, dry environments. They shared Europe for 10,000 years with Homo sapiens. Today they no longer exist. Beyond these facts the fate of Neanderthals has generated much debate. Why did Neanderthalsbecome extinct? State at least two major factors toexplain their fate.
How do we know mitochondrial Eve is every human's ancestor? because only males pass on mitochondrial genes global comparison of nuclear DNA global comparison of human mitochondrial and nuclear sequences comparison of African mitochondrial DNA from the past from fossil remains found in East Africa around 50,000 years ago 00
This organism is an animal. What can you infer about its bodystructure and lifestyle (that might not be obvious from itsappearance)? This animal has a protostome developmentalpattern and a trochophore larva. Identify the major clades thatthis animal belongs to. Explain your selection, and describe whenthese clades originated and how they are related to one another.
Pakicetus is an ancient wolf-like organism that lived 50 million year ago. It had wolf-like ears and nostrils on the front of its skull. Modem whales have a similar ear structure, but their nostrils are on the back of their skull. Aetiocetus lived 25 million years ago, had the same ear structure as both Pakicetus and modern whales, but nostrils in the middle of its skull. According to this information, the most likely concilusion that biologists could draw about the relationship of Aetiocetus to the other organisms is that Aetiocetus O evolved as whale ancestors lost their forward-placed nostrils through disuse. O is the ancestor of both Pakicetus and modern whales. O is not related to either Pakicetus or modern whales. O is a transitional form between Pakicetus and modern whales.
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Give typing answer with explanation and conclusion to all parts What evidence shows that the most recent common ancestor of chimpanzees and humans was much more arboreal than modern humans are? We spoke of paleoenvironmental processes that changed the ecological environmental conditions in Africa somewhere around 7 million years in Africa: which are they? How would have these processes might have selected for a less arboreal lifestyle in the human lineage? Why did the same changes not evolve in the chimpanzee lineage?
Explain why mammal jawbones may have shifted to being a single solid bone from multiple bones. Explain why the huge increase in diversity is usually attributed to the Cambrian Explosion even though diversity may have actually increased prior to the Cambrian.
Biologists have studied many different species, including humans, and have estimated that it takes500,000 years for 1% of the mitochondrial DNA to be changed by mutation. (This is an estimated mutationrate, and is currently being debated). Given that rate of mutation, we can estimate how long two groupshave been reproductively separated by multiplying 500,000 years by the percentage of difference. (If thegroups are 0.3% different: 500,000 x 0.3 = 150,000 years)A representative sample of different human geographical/racial DNA has been collected and analyzed.When all of the different mutations were counted, scientists found that only 0.4% of the DNA of modernhumans has been mutated. How many years have modern humans been on the planet?Archeologists have found skeletal evidence of a modern-type human who lived on this planet about100,000 years ago. You will investigate a partial answer to these questions.Two important questions we will be addressing in this part of the lab are:1) Where…
Which statement is a tenet of the out of Africa hypothesis for the origin of modern humans? O O O O Modern humans evolved in Africa and then migrated throughout the world, replacing earlier human populations. O Modern humans evolved in Eurasia and migrated to Africa, driving resident populations of early humans out of Africa and resulting in their extinction. Homo erectus populations migrated out of Africa and interbred with Homo neanderthalensis populations in Eurasia to give rise to modern humans. O Numerous Homo erectus populations that scattered throughout the world evolved simultaneously to give rise to modern humans.
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