Which of the following bacteria can cause life-threatening pseudomembranous colitis?
A) Clostridium difficile
B) Staphylococcus aureus
C) Streptococcus pyogenes
D) Enterococcus species
E) Clostridium botulinum
A
Biology & Microbiology
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Which of the following scientists discovered penicillin?
A) Alexander Fleming B) Paul Ehrlich C) Selman Waksman D) Sir Howard Walter Florey
Biology & Microbiology
Which of the following is a feature of the nematode nervous system?
a. a true brain with two hemispheres b. spinal cord c. pharyngeal nerve ring d. partial meninges
Biology & Microbiology
A nucleosome is a linear chromosome wound around the ________.
A. mRNA B. nucleolus C. rRNA D. nuclear membrane E. histone
Biology & Microbiology
A liquid that can dissolve other substances is
called a
a. compound. b. mixture. c. solvent. d. solute. e. solution
Biology & Microbiology