What "science and technology" are behind Mars One?
I know you're trolling, but it's really a pretty impressive list. The technology for the communications system, for example, already exists and is in use around Earth and Mars, though they plan to bolster that. We have spacesuits that would work on Mars as-is, though they'll probably want to create Mars-specific ones that reduce the bulkiness and make it more flexible (we're already doing this, by the way, look up NASA's Z-2 suit and Dava Newman's Bio-Suit). We have done lots In-Situ Resource Utilization tests in simulated environments on Earth, and one that extracts oxygen from the atmosphere is likely heading to Mars on the next lander or rover. They'll need to make sure that technology scales up and they have enough easily accessible source material, but that's what the unmanned launch is meant to do. It calls for the as-yet un-launched Falcon Heavy and modified, human-rated Dragon crafts, but SpaceX is on their way to developing their own versions of it. Bigelow Aerospace has created expandable space habitats including one attached to the ISS, I don't see why they couldn't do so for the Mars One food production habitats. I don't think Mars One had a lot of info on how they might grow food, but if you check out the report, it has a pretty fascinating proposal for that aspect, i.e. what crops to grow, how it might fit in the proposed space, and how it affects resource usage. And we're growing lettuce on the ISS using hydroponics right now. And so on.
Sure, the reality TV funding plan is something of a joke and there are plenty of technological hurdles to overcome, but what's important is that Mars One has a starting point and is apparently paying people to execute it and independent researchers are looking at them seriously, pointing out issues, refining the plan, and suggesting improvements. This report might have found lots of problems, but it is nevertheless a very strong step toward fixing them or creating something better.