In story? Yes, their DNA is complete opposites.
In actual science? That makes absolutely zero sense whatsoever.
Yeah it doesn't make sense, which is why there's real world science, then there's MGS science.
Real life logic and video game logic just shouldn't be compared, there's no possible way one can say "this isn't possible at all!" because well...it is possible, in the game universe, so whether it makes perfect sense or no sense at all, real world logic should never be used as an argument because it will always end up losing.
I am a dedicated member of the "Walter Sullivan Is Bad-Ass" group!!!
I am the true originator of the Cookie Demon theory on the SH2 and 3 boards.