A Legionella pneumophila
A. requires special lab growth media.
B. often lives in close associations with amebas.
C. causes fever, cough, and diarrhea.
D. causes a severe pneumonia.
E. All of the choices are correct
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A male cricket creates sounds that we call "chirps" by rubbing one wing against the other. When is this considered an act of communication?
A. Every time the cricket produces a chirp regardless of whether the signal is received by an organism. B. Every time a member of its own species hears a chirp regardless of its response to the signal. C. Every time a female member of its species hears a chirp and changes her behavior in response to the signal. D. Every time the chirp is heard by some other organism that changes its behavior in response to the signal.
Which statement is true?
a. Phyla names based on morphology have been retired. b. All Ecdysozoa have been reclassified as Lophotrochozoa. c. Eumetazoa contains the clades Bilateria and Radiata. d. Molecular data indicate sponges are unrelated to metazoa.
Discuss the ecological significance of the dinoflagellates
What will be an ideal response?
An F' plasmid results when ________.
A. an Hfr × F? mating is interrupted before completion B. an F+ × F? mating is interrupted before completion C. an integrated F plasmid is incorrectly excised, bringing host genes with it D. None of the choices are correct.