Histamine is an example of a(n)
A) endocrine hormone.
B) synaptic messenger.
C) prostaglandin.
D) neurotransmitter.
E) local hormone.
E
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Antigen-presenting cells present antigens to
A) B lymphocytes. B) T lymphocytes. C) dendritic cells. D) neutrophils.
Species on oceanic islands often closely resemble species on the nearest mainland, suggesting that the island and
mainland species share a common ancestry.
a. True b. False
A microbiologist must culture a patient's feces for intestinal pathogens. Which of the following components would likely be present in a selective medium for this purpose?
A. NaCl B. Thioglycolic acid C. Bile salts D. Peptone E. Sheep red blood cells
Population ________ is the number of individuals per unit area, or per unit volume
Fill in the blank(s) with correct word