芽变的变异性状一般与环境条件的变化相一致。
A. 对
B. 错
Clostridium difficile is able to survive in the environment longer than most bacteria because it produces
A. anaerobes
B. Gram negative rods
C. Gram positive rods
D. spores
Which of the following bacteria can produce endotoxin?
A. Clostridium botulinum
Bacillus cereus
C. Escherichia coli O157
D. Staphylococcus aureus
Organisms that do not require oxygen for growth but grow better in its presence are called
A. facultative anaerobes
B. microaerophiles
C. obligate aerobe
D. obligate anaerobe
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