It can't.
An apostrophe should never be used to form a plural. This is grammatically incorrect, though unfortunately common. An apostrophe is commonly, but erroneously, used in numbers such as calendar decades or centuries instead of using the correct form, e.g. 1800s or the 1970s.
Apostrophes should only be used for possessive nouns (but not pronouns), e.g. The cat's food dish or for omissions in contractions, e.g. it's meaning it is.
In some situations it is acceptable to use an apostrophe to clarify a plural. For example, "Make sure you dot all the i's and cross all the t's". This, however, is not an established rule.
If in doubt, leave the apostrophe out.
Yes, the plural form of apostrophe is "apostrophes".
The plural form of "apostrophe" is "apostrophes."
Acronyms do not utilize the apostrophe in the plural form.
The plural of governor is governors (no apostrophe necessary). The plural possessive form of governor is governors'.
No, the plural form of "day" is "days" and does not require an apostrophe. An apostrophe is used to show possession or contraction, not to form plurals.
No. Plural possessive is "their" Possessive pronouns do not use an apostrophe.
The plural is Tuesdays. No apostrophe.
The plural of address is addresses and the plural possessive is addresses' (apostrophe only).
Did you mean "Does believes have an apostrophe?" No, it doesn't.
The plural is schools. The plural possessive form is schools' (apostrophe only).
The plural is schools. The plural possessive form is schools' (apostrophe only).
The plural is composers and the plural possessive form is composers' (just an apostrophe added).