Final answer:
Most plant viruses are not DNA viruses, they are primarily RNA viruses with +ssRNA genomes. DNA plant viruses exist but are less common.
Step-by-step explanation:
The statement "Most plant viruses are DNA viruses" is false. In fact, the majority of plant viruses are RNA viruses, specifically single-stranded positive-sense RNA (+ssRNA) viruses. These viruses act like messenger RNA (mRNA) in host cells. DNA viruses do exist in plants, but they are in the minority. A typical plant virus life cycle involves the virus entering the host cell, replicating its genome using the host's cellular machinery, and then moving cell-to-cell to spread the infection. Additionally, plant viruses can be transmitted in various ways including through insects, mechanical damage, and sometimes from parent plants to their offspring.