Some viral diseases require only one vaccination, which lasts for years. For other diseases like the flu, vaccinations last only one season. The flu vaccine lasts such a short time because the flu virus

A. is more easily transmitted
B. mutates much more rapidly
C. is less dangerous
D. is much smaller


Answer: B. mutates much more rapidly

Biology & Microbiology

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A. a prokaryote B. a viroid C. a plasmid D. a virus E. a prion

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What is NOT functional in malignant

neoplasms that is functional in benign neoplasms?

a. oncogenes b. centrioles c. adhesion proteins d. prophase e. DNA polymerase

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________ are the detrital-feeding organisms responsible for the conspicuous coiled and cone-shaped casts found on sandy beaches

A) Gastropod mollusks B) Lugworms C) Nematodes D) Polychaete worms

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The offspring from each cross done in Mendel's pea experiments always looked like one of the two parental varieties because:

a) many different genes interacted to produce the parental phenotype. b) the alleles blended together to produce the phenotype. c) many different genes interacted to produce the F1 phenotype. d) each allele affected phenotypic expression. e) one allele showed complete dominance over the other.

Biology & Microbiology