False. The number of trees is more than the number of trees cut down.
50% because they would produce two Rr.
We group artworks with similar characteristics into periods or styles because it is easiest to do it that way - this way we can find common characteristics in these literary/artistic eras, and name them. For example, the Renaissance had a distinct style, which differs greatly from that of Romanticism.
They showed how organic molecules could be made from Earth's early atmosphere.
