Four; the upper atmosphere, the atmosphere, the mantle, and the core.
A derived trait is a trait that the current organism has, but the previous one did not have.An ancestral trait is a trait that you, and your ancestors had.A vestigial structure is a structure that had some sort of use in your ancestor, but none in your current body
It would affect our environment very badly. The following reasons are why it is bad: 1)Trees are our main supply of oxygen. 2) Corn is slow at converting carbon dioxide into oxygen. 3) Many wildlife creatures (plants and animals) need that ecosystem to live.
