Since viruses have no active methods of entering plant cells,they must rely upon mechanically-caused wounds,vegetative propagation of plants,grafting,seeds,pollen,and being carried on the mouth parts of chewing insects.Tobacco mosaic virus is most commonly introduced into plants through small wounds caused by handling and by insects chewing on plant parts.What would prevent viruses from easily entering plant cells?

Question

Quizplus · Accepted Answer

The cell wall on the plant acts as a barrier and prevents viruses from easily entering plant cells. The other options listed do not provide a significant barrier against virus entry. The cell wall on the virus (option A) does not play a role in virus entry as viruses do not have cell walls. The plasma membrane on the plant (option B) can be penetrated by viruses, but it is not a significant barrier. The plasma membrane on the virus (option D) is not relevant to virus entry into plant cells. The protein coat on the virus (option E) is involved in virus entry, but it is not a significant barrier when compared to the cell wall on the plant.

Since Viruses Have No Active Methods of Entering Plant Cells,they