Indoor Can plants stand occasional very cold air?

My outdoor plant meet near freezing temps in flower every season...they can take it. Its hard on young plants, especially autos
 
I think I got these pics of a user on here? Can put them in the tent for fire protection

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I got the Firestop in my room. Peace of mind.
 
If someone stop here and looking for info.
I have many nights now 2C°/35F in greenhouse outdoor, i have many(all) different phases plants there. Theyre in black 4/5 gallons pots. 20+ different strains. Nothing really to worry. I understood this question asker is beginner now he/she must be known all this. Yes, ruderalis gene give them cold resistance, ofcourse whats lineage her came to is matter of fact to. Higher latitude cant really grow mexican or smt i mean outies.

Ps! Gas heater is good helper all of them Northen latitudes. And totally fine inside when hard winter.
 

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