When there is no arabinose available in the environment, the AraC protein acts as a(n) ________ for the E. coli ara operon.
Fill in the blank(s) with the appropriate word(s).
repressor
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How are sound vibrations amplified in a vertebrate ear?
A. by movements of the basilar membrane induced by fluid vibrations B. by movement of the bones of the middle ear C. by differences in the surface area of the eardrum versus the oval window D. by movements of the basilar membrane induced by fluid vibrations AND by movement of the bones of the middle ear
What type of genetic recombination results from the mating of two strains of bacteria F+ and F-?
a. transposition b. plasmid genetic recombination c. conjugation d. histone genetic recombination
The reason bread dough "rises" is due to the production of
A) lactic acid. B) carbon dioxide gas. C) ethanol. D) oxygen gas.
Which statement identifies the most likely reason that the carrying capacity of the area to support deer decreased between1925 and 1930