A 100 ml sample of water is filtered through a sterile membrane, and the membrane is transferred to a plate of m-Endo agar. Following overnight incubation at 37°C, 57 green metallic colonies appear. The coliform count is
A. 5700 per 100 ml.
B. 0.57 per 100 ml.
C. 57 per 100 ml.
D. too numerous to count.
Answer: C
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All of the following are adaptations of sea snakes to a marine existence except:
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During graft rejection, cytotoxic T cells of the recipient recognize and respond to foreign class I MHC receptors on the grafted cells.
Answer the following statement true (T) or false (F)