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

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

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Viruses From Animal and Plants
The reovirus and influenza virus contain

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

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