Which of the following events is least likely to result in a genetic change in a bacterium?
A. Conjugation
B. Specialized transduction
C. Pilus formation
D. Natural transformation
E. Generalized transduction
Answer: C
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An antiseptic (or germicide) is distinguished from other sterilizing compounds by
A) being able to inhibit growth of microorganisms but not necessarily kill all of them. B) being able to be used on living tissues without harm. C) its ability to protect from subsequent microbial infectionsâ€"not just initial sterilization. D) killing all bacteria and microscopic fungi but not being effective against viruses.
_____ is the process in which two groups of organisms living in the same habitat diverge into separate species
A. allopatric speciation B. peripatric speciation C. adaptive radiation D. co-speciation E. sympatric speciation
Trichomonas vaginalis lacks mitochondria
Indicate whether this statement is TRUE or FALSE.
A restriction enzyme is most comparable to a ___________
A. screwdriver D. fork B. hammer E. ruler C. pair of scissors