Systematics And The Phylogenetic Revolution Worksheet With Answer Key - Chapter 23 Page 15

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53. Parental care in dinosaurs, crocodiles, and birds is an example of
A.
homoplasy caused by convergence.
B.
homoplasy caused by common descent.
C.
homoplasy caused by evolutionary reversal.
D.
homology caused by convergence.
E.
homology caused by common descent.
54. The evolution of saber teeth in a number of groups of extinct carnivorous mammals is an example
of
A.
homoplasy caused by convergence.
B.
homoplasy caused by common descent.
C.
homoplasy caused by evolutionary reversal.
D.
homology caused by convergence.
E.
homology caused by common descent.
55. The evolution of plant-conducting tubes (sieve tubes) in land plants and brown algae is an example
of
A.
homoplasy caused by convergence.
B.
homoplasy caused by common descent.
C.
homoplasy caused by evolutionary reversal.
D.
homology caused by convergence.
E.
homology caused by common descent.
56. Which one of the following statements about the evolution of complex characters, such as powered
flight, is false?
A.
Phylogenetic analysis using cladistics can help reveal the sequence leading to the evolution of
a complex character.
B.
Usually a single mutation in a key gene controlling development leads to the simultaneous
appearance of the complex character.
C.
Often the initial stage in the evolution of a complex character was an adaptation to some
unrelated selection pressure.
D.
All of the intermediate stages in the evolution of a complex character contributed to the
fitness of the species.
E.
Long periods of time are required for the evolution of complex characters.

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