Well, true. Each Seed would be loaded with organic material to use for the formation of the first 'life' generated by this process, but...Well, its like a seed for a plant, you know? As it itself 'grows', in turn also supporting the fledgling ecosystem, it'd gain new materials to create yet more life. Hm...I guess I forgot about how it'd get the new materials, though...How about it produces them on a molecular and even atomic level, creating the necessary compounds and elements to support life from the desolate terrain, which then is used to produce the ecosystems?