Which genus is resident flora of the mouth, large intestine, and, from puberty to menopause, the vagina?

A. Escherichia
B. Mycobacterium
C. Haemophilus
D. Streptococcus
E. Lactobacillus


Answer: E

Biology & Microbiology

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Some viruses never use DNA to carry out protein synthesis and have only RNA as their genetic material. This would lend evidence to which theory?

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During the stage called neurulation, a flexible rod called a ________ forms along the midline of the dorsal surface of the embryo.

A. neural groove B. notochord C. somite D. dorsal nerve cord

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Chlamydia trachomatis produces a dormant, resistant stage which is transmitted from one host to another.

Answer the following statement true (T) or false (F)

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