The Mineral __________, Precipitated by Mucus in Ancient Cyanobacteria Biofilms

question 28

Multiple Choice

The mineral __________, precipitated by mucus in ancient cyanobacteria biofilms, resulted in the formation of fossils that resemble today's ____________.

• A) hydroxyapatite; Nautilus shells
• B) FeO; banded iron formations
• C) CaCO₃; stromatolites
• D) all of the above
• E) none of the above

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