Signs and symptoms of smallpox generally appear within ___ days following exposure.
A) 2 to 5
B) 7 to 9
C) 10 to 12
D) 14 to 16
Answer: C) 10 to 12
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Height, weight, and eye color are examples of
phenotypes that illustrate all BUT a. polygenic inheritance. b. continuous variation. c. pleiotropy. d. the action of several gene pairs each with additive effects. e. the cumulative effect of several gene products acting to determine phenotype.
How does the antibiotic rifampicin prevent transcription of RNA?
A) Rifampicin blocks binding of RNA polymerase to the promoter. B) Rifampicin prevents chain elongation by preventing formation of the phosphodiester bond. C) Rifampicin prevents the chain termination, so transcripts are too long and are rendered nonfunctional. D) Rifampicin blocks ribosomal RNAs from forming functional ribosomes. E) Rifampicin blocks translation by preventing the mRNA from being processed.
Why are birds classified as reptiles?
What will be an ideal response?
Which of the following can cause pelvic inflammatory disease, characterized by fever and abdominal pain?
A) Neisseria gonorrhoeae. B) Treponema pallidum. C) Staphylococcus aureus. D) Chlamydia trachomatis E) both Chlamydia trachomatis and Neisseria gonorrhoeae