Is there an appostophe in the word ones when showing possession?

No, you do not use an apostrophe with "ones" to show possession.

Here's why:

* "Ones" is a plural pronoun and does not function as a noun that can possess something.

* To show possession, you would use a possessive pronoun like "their" or "its" depending on the context.

Examples:

* Incorrect: The ones' shoes are dirty.

* Correct: Their shoes are dirty.

* Incorrect: The ones' house is beautiful.

* Correct: Its house is beautiful.