A student clones a DNA insert into the SalI site of pBR322 . Select all answers that describe the media on which she could expect growth of E. coli containing the recombinant plasmid
A. nutrient agar with ampicillin
B. nutrient agar with tetracyline
C. nutrient agar with ampicillin and tetracycline
D. nutrient agar with streptomycin
E. nutrient agar with no antibiotics
A and E
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All of the following are true regarding eukaryotic chromosomes EXCEPT
A) the DNA is tightly coiled around histone proteins. B) the chromosomes are located in the nucleoid. C) chromosomes vary in number from a few to hundreds. D) chromosomes can occur in pairs or singles.
Fontanels are ________.
Fill in the blank(s) with the appropriate word(s).
The similarities in function of hummingbird wings and the wings of a butterfly reflect
A) homology but not analogy. B) homology through convergent evolution. C) analogy and homology. D) analogy but not homology.
Because ammonia is very toxic, it is kept at low levels in the body by (select all correct choices):
A. being eliminated. B. being converted to urea. C. being stored away from body tissues. D. being converted to uric acid. E. being converted to amino acids.