_______ tend(s) to occur more frequently than ________
A) Synonymous substitutions, nonsynonymous substitutions
B) Genetic divergence, genetic convergence
C) Transitions, transversions
D) A and B only
E) A, B, and C
E
You might also like to view...
The IRT1 gene is responsible for most of the iron uptake activity in roots (Vert et al., Plant Cell 14 [2002]:1223—33)
To determine the specificity of the IRT1 transporter in Arabidopsis plants, researchers measured the concentration of manganese, zinc, copper, and cobalt contained in wild-type and irt1-1 mutant plants. What conclusions about IRT1 specificity can you draw from the above data? A) Under iron-deficient conditions, IRT1 is highly specific for iron. B) Under iron-deficient conditions, IRT1 is important for the transport of iron and copper. C) IRT1 is important for the transport of iron and copper independent of iron concentration. D) Under iron-deficient conditions, IRT1 is necessary for the transport of iron, zinc, manganese, and cobalt. E) IRT1 participates in the transport of iron, zinc, manganese, and cobalt independent of iron concentration.
The largest organism ever to have existed in the world is (was) a
A. whale. B. dinosaur. C. sequoia tree. D. fungus. E. mammoth.
The reactions of photosynthesis are divided into two categories:a
light-independent reactions and carbon fixation reactions. b. carbon fixation reactions and oxygen fixation reactions. c. light-dependent reactions and carbon fixation reactions. d. light-dependent reactions and citric acid cycle. e. chemiosmosis and photochemical reactions.
Select the best response to the question. ?Which of the following is a clinical indication for the use of a broad spectrum antibiotic?
A) The pathogen is virulent. B) The pathogen has not yet been identified. C) The pathogen is anaerobic. D) The host is immunocompromised.