To test the validity of TSI media, quality control should be performed using which two organisms?
a. Gardnerella and Lactobacillus
b. Erysipelothrix and Gardnerella
c. Propionibacterium and Lactobacillus
d. Actinomyces and Arcanobacterium
B
Only Erysipelothrix produces H2S in TSI agar. All other organisms are negative; therefore, the only positive and negative organisms used for quality control purposes are Erysipelothrix and Gardnerella.
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A mollusk radula is which of the following?
a. foot b. feeding organ c. ear d. sensitive hair e. balance organ
A houseplant placed in a window grows toward the source of light because auxin ____
a. becomes more concentrated on the illuminated side of the plant b. becomes more concentrated in the roots of the plant c. becomes more concentrated on the shady side of the plant d. inhibits the growth of cells on the shady side, so the cells on the sunny side grow larger e. inhibits the growth of cells on the shady side, so the cells on the sunny side grow faster
Information from the right visual field is ____
a. carried into the thalamus by the optic chiasm b. detected by both eyes c. sent directly to the visual cortex d. processed by the right visual cortex e. carried by the left optic nerve
During _________, the chromosomes have reached the poles and a new nucleus forms around them.
a) anaphase b) metaphase c) telophase d) prometaphase e) prophase