Accelerated evolution has occurred in all of the following types of human genes except those for:
A. chemosensory perception.
B. immune function.
C. reproduction.
D. transcription factors.
E. brain development or size.
E
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Who demonstrated that phage genetic material is DNA and not protein?
A. Hershey and Chase B. Chargaff C. Franklin D. Watson and Crick E. Avery, MacLeod, and McCarty
A restriction in genetic variability caused by a drastic reduction in population size is called a
A. Hardy-Weinberg effect. B. founder effect. C. polymorphic effect. D. adaptive effect. E. bottleneck effect.
An average gram of forest soil contains about
A. 4 × 107 protists. B. 2 × 109 fungi. C. 4 × 107 bacteria and archaea. D. 2 × 109 bacteria and archaea.
A bacterial species differs from a species of eukaryotic organisms in that a bacterial species
A) does not breed with other species. B) has a limited geographical distribution. C) can be distinguished from other bacterial species. D) is a population of cells with similar characteristics. E) breeds with its own species.