Reverse transcriptase synthesizes
A. a negative RNA strand from a positive RNA strand.
B. viral RNA from DNA.
C. viral DNA from RNA.
D. a positive RNA strand from a negative RNA strand.
Answer: C
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Prions cause damage to the brain called
a. Alzheimer’s. b. neuronal desensitization. c. spongiform encephalopathy. d. feral neuron disjunction. e. none of these.
oxygen concentration
What will be an ideal response?
Which of the following would support a hypothesis that insects preceded amphibians on land and were flourishing when the first amphibians evolved?
A) Amphibians and insects have many adaptations in common. B) Amphibians and insects share a recent common ancestor. C) Many amphibians are insectivores in their terrestrial stage. D) Amphibians and insects both have lungs in their terrestrial stage.
Must is used in the production of
A. beer. B. red wine. C. sake. D. white wine E. both beer and sake.