Virulence factors of virus aids in its ability to infect cells.
Explanation:
Virulence factors help pathogenic microbes to infect host cells by virulence mechanisms – invade host, cause and spread disease, evade the defense or immune mechanism of the host. These factors makes the virus to grow, replicate, and modify the host cells due to its toxicity.
Viruses binds to the receptor protein of the host cell.
Different types of virulent factors are: invasion factors, adhesive or adherent factors, capsules, endo and exotoxins, etc.
The virulence factors decides the severity and rate of spread of an infection
L<span>ysosome is the membrane-bound sac.</span>
The correct answer is option C, that is, woody, reinforced cell walls.
The prime layer of growth in the roots and stems of various plants, mainly in dicots like oak trees and buttercups, and gymnosperms like pine trees is known as vascular cambium. It generates phloem on the outside and xylem on the inside.
The vascular cambium thickens stems or branches and increases their girth. Thus, due to their unique tendency, one would expect vascular cambium to be simple, undifferentiated cells, which possesses the tendency of rapid cell differentiation, but would not expect them to have woody, re-inforced cell walls.
