Well I have no objections with the scientific theory about the origin of life. The theory of evolution is the most beautiful theory in science and it explains a lot in different areas (economics, languages, etc).
We catholics believe God created directly the universe (Big Bang theory was made by a Catholic priest BTW).
And about 6 thousand years ago God created the first soul in one of the several races of humanoids (following the pattern of "chosen people") . Afterwards this race had a very obvious advantage and killed or/and assimilated the other humanoids. God directly creates every soul since then.
And we believe this soul is immortal and have some conditions to achieve while in this animal body (with a mortal animal soul too).
Sorry my broken English. I have about three languages stored in my mind.