help with this plant

hello, i am new to the growing biz, just wanted to say hi... I got into this when my friend found plants near his house where his dad use to go smoke up, we asked him if it was mj, and he said it was... my friend then transplanted them to pots and started growing inside. He seems to think they are marigold. I have a similar plant in my house that is about 2ft tall and i am not 100% that it is MJ, starting to think its marigold also. anyone can help me figure out what it is.. i been searching the forums but i can't find a good place to ask.. trying to get some seeds to start growing in my attic.. its humid , has 2 windows and only i can access it :) thanks for any help
 
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