... release of carbon dioxide into the atmosphere
I think the best medium is agar. It is a jelly-like substance that is obtained from algae, and is used to culture small organisms such as microorganisms and bacteria.
Hope this helps. :)
Paliozoic era- sea life
Mezazoic era- dinorours
Centozoic era- current time
Increases because there's more food for the carnivores, as a result, the gradually the herbivores will decrease as the reach to a point they are no longer able to feed all the predators
