It is called PANGEA THE SUPERCONTINENT
~Hello there! ^_^
Your question: How often is CO2 cycled through the atmosphere?
Your answer: CO2 is cycled through the atmosphere in 350 years.
Hope this helps~
<span> the answer is D carbon dioxide.</span>
I would go with A, they inherited the wings even though they don't need them today, since evolution has changed the Ostrich in some way.