Answered: b) Fossil evidence shows that it was…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Hello, I need help answering 8b & 8c using the graph below. Pls & thank you! 8. b) Fossil evidence shows that it was not until the evolution of Homo erectus that the brain size in hominins really began to increase relative to body size. The range in brain size of early Homo erectus to late Homo erectus increased from 700 cc to 1000 cc (similar to the gram scale on the y-axis). This includes most of the 3x increase of brain size from Australopithecus to Homo sapiens. But Homo erectus was about the height of modern humans. Does the graph show that brain size in H. erectus increased faster than body size even though H. erectus was taller than Australopithecus? How can you tell? 8. c) Homo floresiensis (the 3.5 ft-tall “Hobbit” from Flores Island in Indonesia) had a brain similar in size to that of a chimpanzee. But H. floresiensis used tools, including bows and arrows, to hunt pygmy elephants. Is it a good idea to make a cast of the interior of the brain case in skulls of H. floresiensis in the hope that the morphology of the brain of H. floresiensis might indicate differences from that of the chimpanzee? Why or why not? Photo reference: Futuyma, D. J. (2017). Chapter 21 Evolution and Homo sapiens. In 1364598148 998145751 M. Kirkpatrick (Ed.), Evolution (4th ed., pp. 545-570). Sunderland, Massachusetts: Sinauer Associates.

1500
1250
Human
1000
3x
750
Gorilla
500
Chimpanzee
250
Other primates
100
125
25
Body mass (kg)
50
75
FIGURE 21.5 Plot of average brain mass against
average body mass for primates. Relative to
body mass, the human brain is three times larg-
er than the average primate brain. (After [41].)
Brain mass (g)
15,

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