Answer:
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A pathogen or infectious agent would be a parasite, fungi, bacteria or virus that is bad for our health. One type of pathogen or infectious agent would be the common cold. You can prevent the spread of the common cold by washing hands with antimicrobial soap often and staying away from others who are sick. Doing this would greatly reduce the chance that you'd get sick, too.
Answer:
The correct answer is B.
Explanation:
Given the baltimore's scheme which used for virus classifications, the most closely related option of virus to the described polio virus with a single stranded RNA in the question would be retroviruses that require a DNA intermediate.
Because much like the single-stranded RNA viruses, the retroviruses do not contain any DNA but they do have an enzyme named reverse transcriptase which they can use to replicate their RNA into the host cells DNA and use the end product for their benefits. So they both work in similar ways.
I hope this answer helps.
<span>The shift from foraging to farming
Hope this helps!</span>