A bird that migrates to Canada during the summer and to the tropics in winter would be expected to have which type of muscle fiber dominating its "breast" meat (the pectoralis muscle that is used in flight)?
a. slow-twitch
b. fast-twitch
c. muscle that utilizes the glycolytic energy system
d. smooth
e. muscle that uses the immediate energy system
A
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The ratio of recombinants to total number of progeny can be simplified to a percentage, and 1% recombination is equal to 1 ____ , which represents the distance between two linked genes
Fill in the blank with the appropriate word.
Synthesis of an enzyme coded by a repressible gene is stopped by thea. transformation of the bacteria. b. accumulation of product that the enzyme catalyzes the production of. c. catabolism of the product. d. RNA polymerase binding to the repressor.
a. transformation of the bacteria. b. accumulation of product that the enzyme catalyzes the production of. c. catabolism of the product. d. RNA polymerase binding to the repressor.
Plants can generally absorb and make use of nitrogen in the form of ____
a. NO3- only b. both NO3- and NH4+ c. NH4+ only
d. N2 only e. both N2 and NH4+
Choose the nutritional mode that is primarily employed by each of the protists listed below.
A. autotrophic B. mixotrophic C. heterotrophic (by absorption) D. heterotrophic (by ingestion)