<prompt> Virus grow well onCell cultureAgar AgarCell free mediaTissue Culture  <response>: Ans. a Cell culture. Ref. Anantanarayan, Microbiology, 6thpg.406CULTIVATION OF VIRUSES:Three methods are employed for cultivation of viruses: Innoculation in animals Embryonated eggs Tissue culture:- Organ culture useful for isolation of some viruses only, that appear highly specific parasite of certain organs- Explant culture obsolete- Cell culture routinely used Primary cell culture Diploid cell culture Continuous cell linesThus cell culture is a subtype of tissue culture and viruses grow well on it. 