Complex sentence: Taphonomic studies indicate that embryos are preserved for longest in reducing, anoxic conditions-these conditions can keep the embryos intact for long enough for bacteria to mineralise the cells and permit their preservation.
Split into simpler sentences: Taphonomic studies indicate that embryos are preserved for longest in reducing, anoxic conditions. These conditions can keep the embryos intact for long enough for bacteria to mineralise the cells and permit their preservation.