Which is a defining characteristic of adaptive immunity?
a. nonspecificity
b. diversity
c. short-lived responses
d. self recognition
e. reliance on surface barriers
ANSWER: b
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________, periodic reports on the susceptibility of clinically isolated organisms to the antibiotics in current local use, are particularly valuable for tracking the emergence of new antibiotic-resistant strains of pathogens
A) Antibiotic susceptibility plates B) Antibiograms C) Direct agglutination reports D) Histograms
Crocodiles are living representatives of ____
a. anapsids b. archosaurs c. lepidosaurs d. synapsids e. dinosaurs
If you start with 3 double-stranded DNA fragments, after 4 cycles of PCR you will have ________ fragments.
A. 48 B. 24 C. 27 D. 12 E. 81
Aminoacyl-tRNA synthetases catalyze covalent addition of ________ ________ to tRNAs.
Fill in the blank(s) with the appropriate word(s).