Repost, I might can help.
Yes, they can benefit an organism. That is why evolution works
The answer is prokaryotic cells evolved first. Brainliest?
Http://www.lcps.org/cms/lib4/va01000195/centricity/domain/4153/study%20guide%20-%20geography%20unit%201%20answer%20key.pdf
organisms are eukaryotic(multiple cells0
viruses are prokaryotic cells (have a nucleus, a thick cell wall, and ribosomes)