Sorry for the delayed response. As paulddraper there is no official doctrine on evolution, but Mormons do not believe in "Creatio ex nihilo" or that the creation of the earth was literally a seven day period. The "days" of the creation story are meant to mean periods of time, and we do not fully understand how God created the earth or that evolution was not necessarily a part of it. Mormons do not accept a lot of the "standard" Christian teachings on creation that actually stem from the Greek/Roman philosophical influence in early Christianity and not from scripture. Our official doctrine encourages us to seek to learn and understand the will and processes of God through science in addition to spiritual experiences.

"Latter-day Saints should strive to use both science and religion to extend knowledge and to build faith." "Is there any conflict between science and religion? There is no conflict in the mind of God, but often there is conflict in the minds of men." http://en.fairmormon.org/Mormonism_and_science/Are_they_comp...

More Sources: http://en.fairmormon.org/Mormonism_and_science/Evolution/Off... http://en.fairmormon.org/Mormon_view_of_the_creation