_____, such as sea squirts, share features of the chordate body plan during early development
A. Tunicates
B. Echinoderms
C. Chordates
D. Cephalochordates
A
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People who can taste PTC have been shown to be more likely than non-tasters to dislike broccoli and
Brussels sprouts. Indicate whether the statement is true or false.
A single base substitution mutation is least likely to be deleterious when the base change results in _____
A) a stop codon B) a codon that specifies the same amino acid as the original codon C) an amino acid substitution that alters the tertiary structure of the protein D) an amino acid substitution at the active site of an enzyme
Considering the structure of double-stranded DNA, which kind(s) of bonds hold one complementary strand to the other?
A) van der Waals B) ionic C) disulfide D) hydrogen E) covalent
Thermococcus litoralis and Thermus aquaticus are thermophilic bacteria that are
A. sources of heat stable DNA polymerases. B. genetically engineered bacteria. C. used as cloning vectors. D. principal sources of restriction endonucleases.