Anatomical vestige1

Anatomical vestige1 - Anatomical vestiges "The wing of the...

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Anatomical vestiges "The wing of the ostrich resembles those of the gyrfalcon and the hawk. Who does not know how the speed of the gyrfalcon and hawk in flight exceeds that of other birds? The ostrich certainly has wings like theirs but not their speed of flight. Truly, it has not the capacity to be lifted from the ground and gives only the impression of spreading its wings as if to fly; however, it never supports itself above the earth in flight. It is exactly the same with all those hypocrites who pretend to live a life of piety, giving the impression of holiness without the reality of holy behaviour." The Aberdeen Bestiary Folio 41v , c. AD 1200 — on the ostrich, its vestiges a symbol of hypocrisy since the 2nd century A.D. Some of the most renowned evidence for evolution are the various nonfunctional or rudimentary vestigial characters, both anatomical and molecular, that are found throughout biology. A vestige is defined, independently of evolutionary theory, as a reduced and rudimentary structure compared to the same complex structure in other organisms. Vestigial characters, if functional, perform relatively simple, minor, or inessential functions using structures that were clearly designed for other complex purposes. Though many vestigial organs have no function, complete non-functionality is not a requirement for vestigiality (Crapo 1985 ; Culver et al . 1995 ; Darwin 1872 , pp. 601-609; Dodson 1960 , p. 44; Griffiths 1992 ; Hall 2003 ; McCabe 1912 , p. 264; Merrell 1962, p. 101 ; Moody 1962 , p. 40; Muller 2002 ; Naylor 1982 ; Strickberger 2000 ; Weismann 1886 , pp. 9-10; Wiedersheim 1893 , p. 2, p. 200, p. 205).
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Figure 2.1.1. Vestigial structures
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This note was uploaded on 11/14/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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Anatomical vestige1 - Anatomical vestiges "The wing of the...

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