The pH indicator in the MR/VP medium is:
A. Phenol red
B. Neutral red
C. Methyl red
D. The correct answer is not listed
Ans: D. The correct answer is not listed
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In cell communication, which one of the following is a requirement of the responding cell?
A. It must be a eukaryotic cell. B. It must produce signaling molecules. C. It must have receptor proteins. D. It must be a prokaryotic cell.
Mammals living in cold environments tend to have ____ bodies and ____ appendages than species living in warm
environments.
a. larger; fewer b. larger; longer c. larger; shorter d. smaller; shorter e. smaller; longer
Figure 44.14
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The following question refers to the age structure diagrams above.
Which statement reflects the age structure of these three countries?
A. India has the greatest proportion of older adults. B. The United States has the greatest proportion of young people. C. India has the greatest proportion of young people. D. China has the greatest proportion of young people. E. China has the greatest proportion of older adults.
How are HIV virions rendered virulent?
A. the action of protease releases reverse transcriptase and capsomeres after the virion buds from the cell. B. they bud to the surface of the host cell. C. they use a chemokine receptor to remove gp120. D. they bind to smooth muscle cells. E. they contact the cytoplasmic membrane via gp41.