Bird flu is caused by ______
a) Bacteria
b) Protozoan
c) Fungi
d) Virus
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Bird flu is caused by virus
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Answer:
Bird flu or Avian flu occurs due to - option d) Virus.
Viruses are parasites which are obligate and lives within a host cell and reproduces there by infecting it.
Bird flu occurs due to influenza virus which comes under the group Orthomyoxoviridae of Baltimore classification that uses '-'ssRNA strand as template for transcribing protein.
Influenza virus goes through antigenic shift and antigenic drift which recombines Hemagglutinin and Neuraminidase spike proteins forming H5N1 the avian flu.
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