Members of the genus Lactobacillus ________.
A. are normal flora of the human body in the mouth, intestinal tract, and vagina
B. produce large amounts of H2 as a byproduct of metabolism when growing on glucose
C. are strict aerobes
D. grow optimally under slightly alkaline conditions
Answer: A
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Organisms such as Streptococcus pyogenes and Staphylococcus aureus that produce leukocidins are called ________ pathogens
A) pyogenic B) radical C) enterotoxigenic D) hemorrhagic
Where is thyrotropin-releasing hormone (TRH) made?
A) anterior pituitary B) posterior pituitary C) follicular cells of the thyroid gland D) hypothalamus
What cell type secretes histamine at the site of an infection?
A) macrophages B) cytotoxic T cells C) mast cells D) natural killer cells E) helper T cells
Portion of Figure 22.11
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Refer to the above figure for questions.
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In the life cycle of a club moss, what is the name of the structure that produces the haploid spores?
A. Strobilus B. Sporophyte C. Gametophyte D. Rhizome E. Strobilus