Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 18.6, Problem 1TC
Paleontologists recently discovered fossil hominins with features characteristic of modern humans in 160,000-year-old sediments in Africa. Which hypothesis does this new evidence support?
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If you as a paleoanthropologist are plannin an excavation at a hominin site in East Africa which is dated to about 2 million years old, which fossil hominin species might you expect to find?
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Some scientists suggest that the Neanderthals and possibly Denisovans, never went extinct, but instead where assimilated into Homo Sapiens. What evidence would you look for to support this hypothesis?
Chapter 18 Solutions
Biology
Ch. 18.1 - How Would the experiments result charge if oxygen...Ch. 18.1 - describe a likely scenario for the origin of life?Ch. 18.1 - describe, for each step in the scenario, some...Ch. 18.2 - Uranium-235, with a half-life of 713 million...Ch. 18.2 - Scientists have identified a free living bacterium...Ch. 18.2 - describe scenarios for the major evolutionary...Ch. 18.2 - State the order in which these events occurred,...Ch. 18.3 - describe fossil evidence of the earliest...Ch. 18.3 - describe the advantages that fostered the origin...Ch. 18.3 - Prob. 3CYL
Ch. 18.4 - Prob. 1TCCh. 18.4 - Does the mudskippers ability to walk on land...Ch. 18.4 - Can ancient DNA reveal the secrets of dinosaur...Ch. 18.4 - Although it may never be possible to recover DNA...Ch. 18.4 - describe the transitions and innovations...Ch. 18.4 - describe the advantages gained by the first plants...Ch. 18.5 - Scientists have cloned a number of animal species,...Ch. 18.5 - explain how extinction has affected the course of...Ch. 18.5 - describe the likely causes of mass extinctions in...Ch. 18.6 - We might be able to more easily distinguish...Ch. 18.6 - Paleontologists recently discovered fossil...Ch. 18.6 - describe the evolutionary history of humans and...Ch. 18.6 - name and describe some characteristics of the...Ch. 18.6 - describe the key features of the most recent phase...Ch. 18.6 - The unexpected discovery that humans interbred...Ch. 18 - Almost all of the oxygen gas in todays atmosphere...Ch. 18 - Extinction a. generally does not occur except...Ch. 18 - In the endosymbiotic origin of the mitochondrion,...Ch. 18 - Which of the following does not list evolutionary...Ch. 18 - Prob. 5MCCh. 18 - Because there was no oxygen in the earliest...Ch. 18 - The molecule _________ became a candidate for the...Ch. 18 - Complex cells that contain a nucleus and other...Ch. 18 - The Sperm of early land plants had to reach the...Ch. 18 - Prob. 5FIBCh. 18 - Prob. 6FIBCh. 18 - Prob. 7FIBCh. 18 - What is the evidence that life might have...Ch. 18 - How did the origin of photosynthesis affect...Ch. 18 - Explain the endosymbiont hypothesis for the origin...Ch. 18 - Name two advantages of multicellularity for plants...Ch. 18 - What advantages and disadvantages would...Ch. 18 - Prob. 6RQCh. 18 - Prob. 7RQCh. 18 - Extinctions have occurred throughout the history...Ch. 18 - In biological terms, what do you think was the...
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- Why is it so difficult to determine the sequence of hominin ancestors that have led to modernHomo sapiensarrow_forwardWhat comparisons are made to support the theory of evolution of modern humans from extinct hominids?arrow_forwardWhile listening to a hominin evolution podcast, the narrator mentions that the overall similarity of Homo erectus fossils from Africa, Asia, and Europe, and through time represents evolutionary statis. What evidence is there that this is not the case? A. The size of the teeth and jaws increased from earlier to later forms. B. There was an overall increase in cranial robusticity from earlier to later forms. C. The thickness of the cranial bone increased from earlier to later forms. D. Brain size increased by approximately 30% from earlier to later forms.arrow_forward
- Why did hominins evolve from an apelike primate?arrow_forwardWhich of the following early hominins exhibits the most morphological similarities with the last common ancestor of humans and chimpanzees? a. Orrorin tugenensis b. Sahelanthropus tchadensis c. Australopithecus anamensis d. Ardipithecus ramidusarrow_forwardWhat are hominins? From the perspective of paleoanthropology, what are the main ways that hominins differ from our closest primate relatives the apes? What key physical features help anthropologists identify whether or...arrow_forward
- According to the latest researches in Physical Anthropology, what is the relationship between Neanderthals and Modern Humans? And what caused the extinction of Neanderthals?arrow_forwardIn the paper “Four Legs good, Two Legs Fortuitous...” what were the selective pressures that drove early hominin evolution? How was Australopithecus physically different from modern day Homo sapiens? How did these traits suit each species to their environment? Describe the role of bipedalism in Homo sapiens evolution. Approximately how early did bipedalism occur?arrow_forwardwhat is a hominin fossil that discusses contrasting perspectives (lumper vs. splitter) of taxonomic placement of the specimen from at least two paleoanthropologists.arrow_forward
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