Which organisms would most likely be present on the bottom or closest to the attachment surface of a complex microbial biofilm?

A. Facultative chemoorganotrophs
B. Anaerobic sulfate-reducing bacteria
C. Eukaryotic protists
D. Cyanobacteria


Answer: B

Biology & Microbiology

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Which of the following supports the argument that viruses are nonliving?

A) They lack genetic material. B) They are not cellular. C) Their DNA does not encode proteins. D) They have RNA rather than DNA. E) They do not evolve.

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In addition to the genital tract, various strains of Chlamydia trachomatis can infect which of the following?

A) lymph nodes B) the lungs C) the conjunctiva D) lymph nodes and conjunctiva E) lymph nodes, lungs, and conjunctiva

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Dense regular connective tissue consists of tightly packed _____

Fill in the blank(s) with the appropriate word(s).

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Electron transport molecules that only transfer electrons include ________.

A. ubiquinone B. FAD C. NADP D. ferredoxin

Biology & Microbiology