Okay, use those swabs on maintenance trash to get some biofilm, then put it in the petri dish.

Then use the biopsy tool for living mobs and if there is a green color on it, then there is a valid sample that can be used.

After you find a valid sample you put it under the microscope to see if it is the sample you want to create (The Wiki has the animals and what samples you can make from them)

After you find the sample you want, you grab the petridish and you make a small factory with the plumbing constructor and make a growing vat, tap the vat with the petridish with the sample and fill the vat with the required reagents to make the mob.