Viruses From Animal and Plants
The reovirus and influenza virus contain

10 different segments of dsRNA and 8 different segments of ssRNA respectively
8 different segments of dsRNA and 10 different segments of ssRNA respectively
5 different segments of dsRNA and 7 different segments of ssRNA respectively
7 different segments of dsRNA and 5different segments of ssRNA respectively

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Viruses From Animal and Plants
Negative strand ssRNA viruses need to have a preformed replicase when they invade a mammalian cell because they

None of these
have to make a positive strand copy that can be translated
use it to terminate transcripts when they copy host cell mRNA
use it to modify host enzymes that are recruited for viral replication

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