Final answer:
Viruses cannot be cultured on TSA or blood agar because they require living host cells to replicate. Bacteriophages can be grown on a bacterial lawn in a Petri dish or flask.
Step-by-step explanation:
Viruses cannot be cultured on TSA (tryptic soy agar) or blood agar because these media are designed for bacterial growth and do not provide the necessary nutrients and conditions for viral replication. Viruses cannot be cultured on TSA or blood agar because they require living host cells to replicate. Bacteriophages can be grown on a bacterial lawn in a Petri dish or flask.
Viruses require living host cells to replicate, so they need to be cultured in living organisms or in vitro using appropriate cell cultures. For example, bacteriophages (viruses that infect bacteria) can be grown in the presence of a bacterial lawn in a Petri dish or flask, where they cause clear plaques by lysing the bacterial cells.