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Strictly speaking every living thing needs oxygen atoms (for example from water), because they are a necessary constituent of the RNA/DNA machinery.
by novaRom 6y ago
Strictly speaking every living thing needs oxygen atoms (for example from water), because they are a necessary constituent of the RNA/DNA machinery.
- ceejayoz 6y agoEvery living thing on Earth. The point they're making is that life off Earth might not use DNA/RNA at all.