Answer:
When the virus infects a cell, the RNA genome enters the cell and programs it to make new virus particles. These virus particles are released from the cell and go on to infect new cells. In humans, poliovirus is ingested, and replicates in cells of the gastrointestinal tract.Poliovirus, the prototypical picornavirus and causative agent of poliomyelitis, is a nonenveloped virus with a single-stranded RNA genome of positive polarity. The virion consists of an icosahedral protein shell, composed of four capsid proteins (VP1, VP2, VP3, and VP4), which encapsidates the RNA genome (1).RNA viruses generally have very high mutation rates compared to DNA viruses, because viral RNA polymerases lack the proofreading ability of DNA polymerases. The genetic diversity of RNA viruses is one reason why it is difficult to make effective vaccines against them.
The process that transports
solutes, including many drugs, into the tubular fluid is called tubular
secretion. Under this process, there is transfer of materials from peritubular
capillaries to the renal tubular lumen and the secretion is caused mainly by
active transport and passive diffusion.
Best Answer: B.Elongated sporophyte<span>
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It is what makes plant stems, leaves, and branches so strong.
