"Seriously, now: you believe trees and grasses existed on Earth prior to the creation of the sun?"
The first five verses of Genesis deal with the creation of light and darkness. Grasses are mentioned in the 11 th verse. Please Read the chapter of Genesis and Darwin and compare the sequence of events. I have no idea who is right or wrong in this. I only know that my faith in The Book tells me that both are possible.
Darwin doesn't have anything to do with the creation of the universe, nor of the solar system, nor of the earth.