All of the following pertain to poliomyelitis, except
A) If virus enters the central nervous system, motor neurons can be infected and destroyed.
B) It can be asymptomatic or mild with headache, sore throat, fever, and nausea.
C) There are effective vaccines to prevent polio.
D) Summer outbreaks in the United States have been recently increasing.
E) It is transmitted primarily by fecal contaminated water.
D) Summer outbreaks in the United States have been recently increasing.
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Amplification is an important characteristic of signal transduction pathways involving surface
receptors. What is amplification and how is it accomplished in the cell?
What will be an ideal response?Which type of mutation converts a nucleotide to an alternative structure with the same composition but a slightly different placement of rare, less stable hydrogen bonds that cause base-pair mismatch?
A) depurination B) deamination C) tautomeric shift D) transition E) transversion
The ornithischian dinosaurs:a
were carnivorous. b. had pelvic bones similar to birds. c. died out during the Jurassic period. d. were the ancestors of the crocodiles and snakes of today. e. were usually small dinosaurs
Homologous chromosomes can be matched by their similar structure and function within a nucleus. Which chromosomes making up a genome do not follow the same characteristics of homology?
What will be an ideal response?