Which of the following versions of the polio vaccine is preferred in the United States?
A) oral polio vaccine which is made up of an attenuated viral strain
B) antibiotic treatment to clear the infection
C) transgenic DNA vaccine, which is made by inserting DNA for polio capsid proteins into the genome of a nonvirulent virus
D) inactivated polio vaccine which is injected into muscle and requires several boosters
E) Currently no vaccine is available, and patient isolation is the preferred method of control.
Answer: D
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A. ?E; ?F B. ?F; ?K C. ?F; ?E D. ?K; ?F
The key mediators of apoptosis are the ________.
Fill in the blank(s) with the appropriate word(s).
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a. plants b. cyanobacteria c. green algae d. fungi e. animals
The phenotype is _____
A. controlled by the genotype B. the expression of a trait in an organism C. the result of inheritance from both parents D. never homozygous E. all of these