Which class of animals has the largest number of species?
a. Arachnida
b. Insecta
c. Gastropoda
d. Bivalvia
e. Arthropoda
b
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The organism that grows anaerobically in dead or damaged tissue and produces dense colonies that are the color and size of sulfur particles is
A. Escherichia coli. B. Staphylococcus aureus. C. Actinomyces israelii. D. Pseudomonas aeruginosa.
In what order will you encounter the following structures if you examine the human ear from the outside inward?
A. tympanic membrane ® malleus ®incus ® stapes ® oval window ® cochlea B. tympanic membrane ® incus ®malleus ® stapes ® oval window ® cochlea C. tympanic membrane ® stapes ®malleus ® incus ® oval window ® cochlea D. tympanic membrane ® malleus ®incus ® stapes ® cochlea ®oval window E. tympanic membrane ® oval window ® malleus ®incus ® stapes ® cochlea
In a resting neuron, which ion is leaking out of the cell?
a. potassium only b. sodium only c. chloride only d. calcium only e. both sodium and potassium
The five stages of a lytic infection are attachment, penetration, __________, assembly, and release
a. lysis b. prophage c. replication d. lysogenesis e. transduction