I guess it is increasing concentration of carbon
producing a hole on ozone is because of the Freon in air conditioners and i guess all the others are wrong <span />
If they are continuously dividing this means there is something wrong with them because normal cells don't do this. That means they have an error in their DNA. If it grows incessantly this error is being spread in the body when it shouldn't be, which can lead to subversive effects on the human body
No! matter is not created nor distroyed
I would say immigration only.
emigration would theoretically reduce the genetic variation as unique individuals leave, but immigration would bring unique traits into circulation in an ecosystem.
I'm not super great at biogy tho so this might not be right... :)
