MacConkey-sorbitol agar is useful for detecting pathogenic strains of:

a. E. coli.
b. Shigella spp.
c. Salmonella spp.
d. Vibrio spp.


A
Sorbitol-negative E. coli can be serotyped using commercially available antisera to determine whether the somatic O antigen 157 and the flagellar H antigen 7 are present.

Biology & Microbiology

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The female reproductive parts of a typical flower are found in the ________

a. sepal b. stamen c. calyx d. carpel

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In insects, oxygen passes from the ______ to the tissues

a. cuticle of the epidermis to the blood b. tracheae directly c. tracheae to the blood d. lungs to the blood e. gills to the blood

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The typical waking and sleeping cycles of most people can be described as:

a. crepuscular. b. nocturnal. c. diurnal. d. lunar. e. annual.

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Vitamin K is required for

A) proper kidney function. B) blood clotting. C) night vision. D) energy metabolism. E) collagen synthesis.

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