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

vitropexis
ectodesmata
viropexis
vivopexis

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Viruses From Animal and Plants
Influenza virus undergoes antigenic shift resulting in major antigenic changes by which of the following mechanisms?

Reassortment of RNA segments from different influenza viruses
Expression of several different capsule types
Changing the receptor binding canyon that docks with the host receptor
Somatic recombination of heavy and light chains

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