A microbiology student sampled a site that did not produce any colony growth on the nutrient agar, nor any turbidity in the nutrient broth after 48 hours. What steps could she take to further determine if microbes are present at her sample site?
A) Incubate the nutrient agar plates and broth for longer than 48 hours
B) Inoculate enriched media as well as nutrient agar/nutrient broth
C) Resample the site at different times of day
D) Take multiple samples from the same site
E) All of the above
E) All of the above
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You are examining a human pedigree for a trait. You notice that the trait appears in every generation; is equally likely to occur in males and females; and, when one parent is affected, about half of his/her offspring are affected
The trait is most likely: A. dominant. B. recessive. C. epistatic. D. produced by multiple alleles. E. incomplete penetrance.
In the United States, parathion is the most widely used member of a class of ____
a. organophosphate herbicides b. organophosphate insecticides c. chlorophosphate fungicides d. chlorophosphate herbicides e. chlorophosphate insecticides
The connective tissue in bones where blood cells are made is the ____________________. Fill in the blank(s) with the appropriate word(s)
Which structure generates the ATP that is required for movement of the sperm's tail?
A) a mitochondrion in the neck and middle piece B) mitochondria in the sperm tail C) the sperm plasma membrane D) the acrosome