A stroke may occur when
a. a vessel in the brain ruptures.
b. a vessel in the heart ruptures.
c. a vessel in the brain is blocked by a clot.
d. a vessel in the heart is blocked by a clot.
e. a vessel in the heart ruptures, and a vessel
in the brain is blocked by a clot
C
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Which of the following could use reverse transcriptase to transcribe its genome?
A) ssRNA B) dsRNA C) ssDNA D) dsDNA
A viral species is found to infect host fishes in isolated mountain lakes. The host range is
A. the one or more infected species of fishes that exhibit the viral disease symptoms. B. All of the answer choices are correct. C. the specific sizes and shapes of the fish tissue cells that become infected by the viruses. D. the mountainous area, in which the isolated lakes are found and mapped. E. impossible to determine, because the isolated lakes don't allow tests for the infection of other fishes.
Select the best choice for statements 131–134 in reference to the
five classes listed below. a. Chondrichthyes b. Osteichthyes c. Amphibians d. Reptilians E 131. Members of this class are fully terrestrial except for reproduction. M 132. Members of this class have cartilaginous skeletons but also possess jaws. M 133. Some species of this class live in water but are not dependent upon an aquatic environment. D 134. Members of one unusual group may have been ancestors of amphibians.
Which of the following takes place during translation?
A) the conversion of genetic information from the language of nucleic acids to the language of proteins B) the conversion of genetic information from DNA nucleotides into RNA nucleotides C) the conversion of genetic information from the language of proteins to the language of enzymes