A eukaryotic cell has a well-defined nucleus and organelles, including mitochondria and plastids.
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Q11: Glaciers were rare during the Proterozoic, as
Q12: Both the presence of banded iron formations
Q13: Orogens are belts of igneous and metamorphic
Q14: Passive margin deposits are rare or absent
Q15: The Ediacaran fauna of Australia includes many
Q17: The Ediacaran fauna of Australia is an
Q18: The primary source for free oxygen introduced
Q19: Eukaryotic cells have a nucleus and other
Q20: Sandstone-carbonate-shale assemblages are characteristic of active margin
Q21: Which biological process may have resulted in
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