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
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A particle that consists of nucleic acids surrounded by protein and requires a host organism to replicate is
A. a prokaryote B. a viroid C. a plasmid D. a virus E. a prion
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
________ 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
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.