E. coli strains that are Hfr
A) are easily mutated.
B) are susceptible to infection by bacteriophage.
C) contain the F factor integrated in the bacterial chromosome.
D) cannot be made competent.
E) have a low frequency of recombination.
C
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Archaeal promoters are most similar to those of ________.
A. eukaryotes B. bacteria C. viruses D. both viruses and bacteria
Although Darwin and Wallace understood the central importance of heritability among organisms to the process of
evolution, they could not explain how new variations arose or how they were passed to the next generation.
Indicate whether the statement is true or false.Although the function of the flexible outer sheath in which the axial filaments of spirochetes lay is unknown, it is nonetheless essential (i.e., the bacteria will not survive if it is removed).
Answer the following statement true (T) or false (F)
How do lycophytes differ from bryophytes?
A. Lycophytes use flowers for reproduction. B. Lycophytes produce seeds. C. The dominant stage in a lycophyte is the gametophyte. D. Lycophytes have tracheids.