The American Official Analytical Chemist’s use-dilution test measures how well a disinfectant works against a high microbial load dried onto a hard, nonporous surface.

A) True
B) False


A) True
Feedback: This test does not measure how well a disinfectant works on a soft, porous surface.

Biology & Microbiology

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During translation in prokaryotes, formation of the initiation complex requires all of the following except  

A.  a small ribosomal subunit. B.  mRNA. C.  tRNA charged with N-formylmethionine. D.  RNA polymerase. E.  initiation factors.

Biology & Microbiology

The protist that is most closely related to animals is the:

a. amoeba b. choanoflagellate c. dinoflagellate d. euglenoid e. paramecium

Biology & Microbiology

Convergent evolution resulted in placental and marsupial mammals with similar structural features

____________________ Indicate whether the statement is true or false.

Biology & Microbiology

Seeds were important in the evolutionary success of _____________, because they increased the success (to survive and reproduce) of the plant's offspring.

A. Bryophyte B. Angiosperms C. Pine trees D. Club mosses E. More than one above is correct

Biology & Microbiology