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

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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

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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