A colony of rats lives in her hair.
the trip to the penguin colony was fruitful
"The colony of Plymouth was founded in 1620".
The colony has decided to boycott tea!
Because the sentence is a question, the antecedent comes after the noun."What was the colony you wanted to research with Rachel for the report?" (The colony was what...)
Of course colony is used in a sentence get your facts right
There is a colony of ants near the back door.
A colony of ants is marching on my corn patch! There's a fresh colony of ants invading the kitchen.
"The ant colony's" is not a sentence, it's a noun phrase. There is no possessive pronoun in this noun phrase. There is no pronoun in this noun phrase.
The Dutch sold their colony of New Amsterdam to the English, and this colony eventually became New York.
A royal colony is an establishment by royal command. The royal colony grew into a great city.
a long time ago, pennsylvania was just a colony
A colony of ants has invaded the house! I hope that the first colony on Mars has a nice view.