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(A) Viruses usually infect the whole plant except the stem apex (shoot apical meristem).This is because the apical meristematic cells have a high conc

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Stem apex

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(A) Viruses usually infect the whole plant except the stem apex (shoot apical meristem).This is because the apical meristematic cells have a high concentration of growth hormones,such as auxins,which inhibit viral replication and movement.Additionally,the rapid rate of cell division in the apical meristem often outpaces the spread of the virus,keeping these regions virus-free.

Viruses usually infect the whole plant except the

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