Randomly selecting samples of experimental units from an environment can result in
a. sampling error.
b. blind testing.
c. evidence.
d. experimental design.
e. consensus.
ANSWER: a
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Varicella-zoster virus (human herpesvirus-3)
A. uses the respiratory epithelium as its portal of entry B. becomes latent in dorsal root ganglia that serve specific dermatomes C. has humans as its reservoir D. causes chickenpox and shingles E. All of the choices are correct
Which of the following statements best describes the Hox genes of the different groups of animals?
A. All animals have Hox genes. B. Invertebrate chordates have one cluster of Hox genes. C. Gnathostomes have four clusters of Hox genes. D. Hox genes are involved with the evolution of structural complexity. E. All the choices provided are correct.
Proto-oncogenes operate in healthy cells
1.True 2.False
We consider the rare event of viral-induced in vivo transformation of host cells as a "failure" of the virus' replication cycle because
a) Viral genomes normally don't integrate into the host genome b) Successful viral replication usually results in host cell death c) Viruses need to keep the cell in G1 phase in order to make more viral particles d) Viral replication in a cell effectively shuts down expression of all host genes