An apostrophe is the mark ' when it is written to indicate that one or more letters have been left out of a word, as in 'isn't' and 'we'll'. It is also added to nouns to form possessives, as in 'Mike's car'.
https://www.collinsdictionary.com/dictionary/english/apostrophe
Question 1: Is as an adverb?
Question 2: Does as mean "for example"?
Photon Question 1: Is as an adverb? No. It depends who you ask.
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PhotonQuestion 1: Is as an adverb?
No. It depends who you ask. Sometimes it's said to be a conjunction, sometimes a preposition.
PhotonQuestion 2: Does as mean "for example"?
Something like that, but more precisely it means "like".
... left out of a word, [ as/like ] (it is)