There is always concern that new strains of influenza virus will emerge; lack of resistance to a particularly virulent virus could result in a pandemic. Which statement best describes one mechanism by which a "new virus" could be created?
A. Viral RNA polymerase creates additional RNA genomic segments.
B. One of the eight RNA segments of the influenza genome is eliminated from viral genome.
C. Viral RNA polymerase creates an inaccurate cDNA copy from which RNA transcripts are synthesized.
D. The RNA genome is inaccurately replicated by the viral RNA polymerase.
E. The viral genome is inaccurately translated by host ribosomes.
D
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People have a long history of ________ the ocean's resources especially as technology improves
a. observing b. appreciating c. overexploiting d. conserving
The two photosystems of light reactions are
designated a. type 1 and type 2. b. type I and type II. c. photosystem A and photosystem B. d. photosystem 680 and photosystem 700. e. photosystem I and photosystem II
If a shoot's tip breaks off, ____ levels rise and stimulates cell divisions in the lateral buds.
A. auxin B. gibberellin C. cytokinin D. abscisic acid E. ethylene