The second line of defense consists of responses of the cells and proteins that make up ____________.
What will be an ideal response?
innate immunity
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When assessing the role of conjugative bacteria in the spread of antibiotic resistance genes, it is fair to say that Hfr cells contribute most while F- cells contribute least.
Answer the following statement true (T) or false (F)
In spliceosome-mediated pre-mRNA splicing:
A. U2 snRNA basepairs to both sides of the of the splice junction. B. U2 and U6 snRNAs basepair during the two transesterification reactions. C. U6 snRNA basepairs to the 3' end of the intron. D. U5 snRNA basepairs to the 3' end of the intron.
The text discusses an incident where a number of
whales beached themselves in 2001. What is true about this case? a. It happened near an area where the United States Navy was testing a sonar system. b. Very loud, low-frequency sounds were sent through the water. c. The whales hurriedly surfaced in fear. d. Rapid change in pressure damaged the whales’ acoustic systems. e. All of these are true.
The mode of natural selection in which extreme phenotypes are less fit than the optimal intermediate phenotype is?
A. Stabilizing selection B. Artificial selection C. Uniformitarianism D. Directional selection E. Disruptive selection