Viruses From Animal and Plants
The penetration of animal viruses into attached cells occur by mechanisms consisting of engulfment of whole virions by the cells in a phagocytic process called

viropexis
ectodesmata
vitropexis
vivopexis

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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

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

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