1. Evolution. Usually what they call "evolution" is actually "metamorphosis." One species giving birth to a completely separate species isn't the next step in evolution, it's fucking crazy. If it ever did happen, far from being an example of the theory in practice, we'd just about have to throw evolution completely out the window.
2. Genetics. You can't just splice any goddamn things you feel like together. It doesn't even work that way here on Earth, if we're going to start talking about extraterrestrial life which would have NO commonalities in the genetic code, forget it. Don't get me started on sexually-reproduced alien-human hybrids, and double don't get me started on such hybrids which are themselves sexually fertile. Also, your DNA doesn't hold your fucking memories. If we cloned you it would be a different person entirely, and would have to start as a baby, not identical to your present state.
3. Computers can't do that. Whatever it is you're having them do, it probably doesn't work that way. A picture only has so much resolution, and even if you could hack that satellite, that won't make the satellite shoot laser beams or whatever you've decided to make it do.
4. Science is not a monolithic study or practice. You should not be asking a geologist character a question that is more appropriate for an astrophysicist. More to the point, he should not be giving you an answer.
5. The notion that everything actually has to be explained with something science-y. Show us a weird doodad and make it behave credibly and consistently within your story and we'll probably accept it. All you do by trying to explain it with real science is highlight how completely it would not work that way.
Oh, and also, there's no sound in space.
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Top five subjects -- academic, pop cultural, whatever -- you'd like to be a geek about, but don't know enough to claim the title.