Kidneys are thought to have evolved first among the _____________.
A. saltwater bony fishes
B. amphibians
C. reptiles
D. mammals
E. freshwater bony fishes
E. freshwater bony fishes
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The proportion of the air we breathe accounted for by oxygen is approximately ___%.
A. 21 B. 1 C. 5 D. 50 E. 78
Structures that have similar structure and function but different evolutionary origins are called:
A. inherited. B. evolutionary modifications. C. analogous. D. homologous. E. uniform.
The speciation of cichlid fishes of the same African crater lake is an example of
a. divergence. b. parapatry. c. gene flow. d. allopatry. e. sympatry.
The endosymbiont hypothesis is supported by
the work of ____ on bacteria-infected Amoeba proteus. a. Stanley Miller b. Kwang Jeon c. Thomas Brock d. Lynn Margulis e. Australian researchers