#Question id: 4994
#Unit 11. Evolution and Behavior
In certain motile prokaryotes, dozens of different proteins comprise the motor that powers the prokaryotic flagellum. The motor has a complicated structure, and its various proteins interact to carry out its function. Based on Darwinʹs explanation for the existence of human eyes, how would he probably have explained the existence of such motors?
#Question id: 4993
#Unit 11. Evolution and Behavior
If the prokaryotic flagellum developed from assemblages of proteins that originally were not involved with cell motility but with some other function instead, then the modern prokaryotic flagellum is a(n)
#Question id: 4992
#Unit 11. Evolution and Behavior
The existence of the phenomenon of exaptation is most closely associated with which of the following reasons that natural selection cannot fashion perfect organisms?
#Question id: 4991
#Unit 11. Evolution and Behavior
Which of these fly organs, as they exist in current fly populations, best fits the description of an exaptation?
#Question id: 4990
#Unit 11. Evolution and Behavior
Fly species W, found in a certain part of the island, produces fertile offspring with species Y. Species W does not produce fertile offspring with species X or Z. If no other species can hybridize, then species W and Y
#Question id: 4989
#Unit 11. Evolution and Behavior
If the malesʹ halteres have species-specific size, shape, color, and use in courtship displays, and if the speciesʹ ranges overlap, then the speciation events may have been driven, at least in part, by which of the following?