The loudness of sound is measured in

a. millihertz.
b. decibels.
c. megahertz.
d. watts.
e. gigahertz.


B

Biology & Microbiology

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Why is there free oxygen in the air?

A. Evaporation of the oceans liberated oxygen. B. It is a by-product of photosynthesis. C. Organisms need oxygen to manufacture ATP. D. Free oxygen has seeped from cracks in the earth's crust. E. Free oxygen has been present since the formation of the earth's atmosphere.

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Immunoglobulin is the scientific name for

A. a phagocyctic cell B. antibodies C. cell-mediated immunity D. complement activation E. cytotoxic T cells

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In performing a bacterial spore staining techniques, the primary stain is

A. Methylene blue B. Cotton phenol blue C. Carbolfuchsin D. Malachite green E. Crystal violet

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A fastidious organism must be grown on what type of medium

A. differential medium B. enriched medium C. defined medium D. general-purpose medium

Biology & Microbiology