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What era are we living in?
prokaryotic cells
eukaryotic algae
outgassing
abundance of radioactive isotopes
radiometric dating
Cenozoic
eukaryotic cells contain nuclei
Proterozoic
At the end of what eon did the first continent form?
prokaryotic cells
eukaryotic algae
outgassing
abundance of radioactive isotopes
radiometric dating
Cenozoic
eukaryotic cells contain nuclei
Proterozoic
Which of the following are small and contain no nuclei?
prokaryotic cells
eukaryotic algae
outgassing
abundance of radioactive isotopes
radiometric dating
Cenozoic
eukaryotic cells contain nuclei
Proterozoic
What is the main difference between eukaryotic and prokaryotic cells?
prokaryotic cells
eukaryotic algae
outgassing
abundance of radioactive isotopes
radiometric dating
Cenozoic
eukaryotic cells contain nuclei
Proterozoic
Why was the earth so hot in its early days?
prokaryotic cells
eukaryotic algae
outgassing
abundance of radioactive isotopes
radiometric dating
Cenozoic
eukaryotic cells contain nuclei
Proterozoic
What process did geologistsuse to determine that the Earth is 4.6 billion years old?
prokaryotic cells
eukaryotic algae
outgassing
abundance of radioactive isotopes
radiometric dating
Cenozoic
eukaryotic cells contain nuclei
Proterozoic
The first evidence of multicellular animals comes from
prokaryotic cells
eukaryotic algae
outgassing
abundance of radioactive isotopes
radiometric dating
Cenozoic
eukaryotic cells contain nuclei
Proterozoic
What process helped form Earth's early atmosphere and the oceans?
prokaryotic cells
eukaryotic algae
outgassing
abundance of radioactive isotopes
radiometric dating
Cenozoic
eukaryotic cells contain nuclei
Proterozoic
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