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.
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The female reproductive parts of a typical flower are found in the ________
a. sepal b. stamen c. calyx d. carpel
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
The typical waking and sleeping cycles of most people can be described as:
a. crepuscular. b. nocturnal. c. diurnal. d. lunar. e. annual.
Vitamin K is required for
A) proper kidney function. B) blood clotting. C) night vision. D) energy metabolism. E) collagen synthesis.