However something to consider is that whatever biological material that ends up landing elsewhere probably wouldn't be able to survive and reproduce. I say that because even the hardiest microbial organisms on Earth still depend on the activity of other species in the ecosystem. For instance, only certain species of bacteria produce Vitamin B and I can't think of any species that is completely self-reliant. It's one thing to keep a cell from dying in a harsh environment, but it would have to bootstrap itself into metabolizing and reproducing in a barren environment with no prior life to consume building blocks from.
That being said, I'm not enough of a biologist to know if there are any extremophile bacteria which are completely self sufficient. If there are, we can rule out my layman's assertion/thought experiment.