When activated, trigger(s) a chain reaction that puncture(s) bacterial cell membranes.

A. histamine
B. interleukin
C. ADH
D. complement proteins
E. epinephrine


D. complement proteins

Biology & Microbiology

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Which of the following causes sodoku, which is characterized by swollen lymph nodes, chills, fever, headache, vomiting, and often severe joint pains, a rash on the palms, soles of the feet, and other extremities, and a granulomatous lesion?

a. S. moniliformis b. S. minus c. Bordetella spp. d. Pasteurella spp.

Biology & Microbiology

Two species have homologous structures. What can we infer?

a. The structures are identical. b. The structures have the same function. c. The species have very different ancestors. d. The species are related by a common ancestry. e. The structures have the same function and they are identical.

Biology & Microbiology

Cartilage, bone, and blood are examples of ________ tissue

A) connective B) epithelial C) nerve D) muscle E) undifferentiated

Biology & Microbiology

During stationary phase, group members of Serratia produce prodigiosins that contain pyrrole

Considering its structural relatedness to other pyrrole-containing molecules of known function (e.g., chlorophylls, bacteriochlorophylls, porphyrins), propose a potential ecological role for these compounds in soil where they are involved in something other than photosynthesis. What will be an ideal response?

Biology & Microbiology