Subject: How do cockroaches or invertebrates adapt to other environments for ex. CO2

I am doing a science report on this and I need to know how these creatures 
adapt to different enviorments. For example breeding a cockroach in a   
ecosystem were I would start with just oxygen and slowly put carbon 
dioxide in and as they bred I would add a little more each new generation. 
I wouls like to know how they would adapt.  Also what the difference 
between how a cockroach adapt to how a worm adapt. 
Well I hope you can help me.
 

Re: How do cockroaches or invertebrates adapt to other environments for ex. CO2