Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 18.6, Problem 2CYL
- name and describe some characteristics of the hominin species that played key roles in humans’ evolutionary history?
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How do paleoanthropologists explain why the earliest hominins evolved in Africa and not elsewhere?
The first modern humans evolved in Africa.
a) What are two kinds of evidence supporting that conclusion, one based on data from living individuals and one from some other source of data?
b) What are some unique anatomic and behavioral traits that are unique to hominid species compared to primates, and to Homo sapiens in particular, compared to other hominid species?
Identify the change that marks the beginning of hominid evolution.
Chapter 18 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 18.1 - describe a likely scenario for the origin of life?Ch. 18.1 - How Would the experiments result charge if oxygen...Ch. 18.1 - describe, for each step in the scenario, some...Ch. 18.2 - describe scenarios for the major evolutionary...Ch. 18.2 - Uranium-235, with a half-life of 713 million...Ch. 18.2 - State the order in which these events occurred,...Ch. 18.2 - Scientists have identified a free living bacterium...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 - Can ancient DNA reveal the secrets of dinosaur...Ch. 18.4 - describe the transitions and innovations...Ch. 18.4 - Prob. 1TCCh. 18.4 - Although it may never be possible to recover DNA...Ch. 18.4 - describe the advantages gained by the first plants...Ch. 18.4 - Does the mudskippers ability to walk on land...Ch. 18.5 - explain how extinction has affected the course of...Ch. 18.5 - Scientists have cloned a number of animal species,...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 - The unexpected discovery that humans interbred...Ch. 18.6 - describe the evolutionary history of humans and...Ch. 18.6 - Paleontologists recently discovered fossil...Ch. 18.6 - name and describe some characteristics of the...Ch. 18.6 - describe the key features of the most recent phase...Ch. 18 - Extinctions have occurred throughout the history...Ch. 18 - Because there was no oxygen in the earliest...Ch. 18 - Almost all of the oxygen gas in todays atmosphere...Ch. 18 - What is the evidence that life might have...Ch. 18 - In biological terms, what do you think was the...Ch. 18 - The molecule _________ became a candidate for the...Ch. 18 - Extinction a. generally does not occur except...Ch. 18 - How did the origin of photosynthesis affect...Ch. 18 - Complex cells that contain a nucleus and other...Ch. 18 - In the endosymbiotic origin of the mitochondrion,...Ch. 18 - Explain the endosymbiont hypothesis for the origin...Ch. 18 - The Sperm of early land plants had to reach the...Ch. 18 - Which of the following does not list evolutionary...Ch. 18 - Name two advantages of multicellularity for plants...Ch. 18 - Prob. 5FIBCh. 18 - Prob. 5MCCh. 18 - What advantages and disadvantages would...Ch. 18 - Prob. 6FIBCh. 18 - Prob. 6RQCh. 18 - Prob. 7FIBCh. 18 - Prob. 7RQ
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- Explain the pattern of human evolution according to each of the four trends of hominin mosaic evolution: a large brain, transition to bipedality, dental arcades, and the growth of language.arrow_forwardWhich hominins might be ancestral to us choose one that you find especially interesting (except H. sapiens) and explain how it fits into the picture of the Hominin family?arrow_forwardEvolution in Humans 1) explain how fossil evidence is used to reconstruct the hominid history 2) explain how genetic evidence is used to document changes in species and populations over time 3) describe several techniques that paleontologists today use to establish fossil agearrow_forward
- list TWO similarities between early members of the genus Homo (e.g. H. habilis) and Homo erectus/ergaster that earlier hominins (e.g. gracile Australopithecines) do not have?arrow_forwardExplain the pattern of human evolution in reference to each of the four trends of hominin mosaic evolution (cranial capacity, bipedalism, dental arcades, the growth of language).arrow_forwardExplain the change in the classification of hominids in recent years. What hominoids are we now considered to be most closely related to?arrow_forward
- Define a Hominin and their characteristicsarrow_forwardWhat is the difference between a "derived" versus a “primitive" trait? Give an example of both, seen in Au. afarensis. Which of the paleoenvironment hypotheses have been used to describe early hominin diversity, and which have been used to describe bipedalism? Which anatomical features for bipedalism do we see in early hominins? Are these primarily obligate bipeds? Explain. Describe the dentition of gracile and robust australopithecines. What might these tell us about their relative diets? List the hominin species argued to be associated with stone tool technologies. Are you convinced of these associations? Why/why not?arrow_forwardWe have studied how the six major primate groups evolved, with the most recent group being the hominins.The hominins branched off from main ape group around 7 million years ago.According to our lessons explain your reasoning as to whether there is a missing link,or one single specimen that embodies both ape and hominin traits, that serves as a transition between what is clearly ape and what is clearly hominin?What have you found most interesting about the beginning of hominin evolution and why?arrow_forward
- What is both the physical and cultural evidence that Homo sapiens nenaderthalensis is an ancestral hominin to Homo sapiens sapiens (modern humans)?arrow_forwardBrown et al. and Morwood et al. reported in 2004 that they had found skeletal remains of a previously unknown type of hominin, now dubbed Homo floresiensis, on the Indonesian island of Flores. These hominins were small (approximately 1 m tall) with small braincases (approximately 380 cm3) as compared with other hominins. The remains of H. floresiensis were found alongside handmade stone tools and the remains of dwarf elephants that also inhabited the island, suggesting that H. floresiensis was able both to make tools and to coordinate the hunting of animals much larger than itself. H. floresiensis is estimated to have lived at the site where the remains were found from 700,000 years ago to 60,000 years ago. Which would be the most feasible method of figuring out to which other hominin species H. floresiensis was most closely related? Compare the average body size of H. floresiensis to that of each of the other hominin species. Compare the type of prey hunted by H. floresiensis to that…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_forward
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