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Health, 31.07.2020 22:01 erikloza12pdidtx
You should only cross the road at a0, or where there is a crosswalk.
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Health, 23.06.2019 04:00, kbraggs13
Viruses use the host's machinery to make copies of themselves. however, some human viruses require a type of replication that humans do not normally have. for example, humans normally do not have the ability to convert rna into dna. how can these types of viruses infect humans, when human cells cannot perform a particular role that the virus requires? a) the virus causes mutations in the human cells, resulting in the formation of new enzymes that are capable of performing these roles. b) the viral genome codes for specialized enzymes not in the host. c) the virus infects only those cells and species that can perform all the replication roles necessary. d) viruses can stay in a quiescent state until the host cell evolves this ability.
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Which of these contraceptive methods on its own is least likely to prevent pregnancy ? a. spermicides b. condoms c. surgical sterilization d. oral contraceptives
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You should only cross the road at a0, or where there is a crosswalk....
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