Earth Science Geology, the Environment, and the Universe

Section 4: Early Life on Earth

Self-Check Quizzes-English

1
What were the type of life-forms that existed before the Proterozoic?
A)prokaryotes
B)eukaryotes
C)algae
D)fungi
2
What did organisms of Earth's first 4 billion years have in common?
A)They were single-celled organisms.
B)They were multi-celled organisms.
C)They breathed oxygen.
D)They were photosynthetic.
3
According to the table, what were the first organisms to evolve on Earth?
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078746361/561661/at.GIF','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (18.0K)</a>
A)ediacara organisms
B)bacteria
C)jellyfish
D)green algae
4
According to the figure, in which era or eon did life first emerge?
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A)Archean
B)Paleozoic
C)Proterozoic
D)Mesozoic
5
__________ are the building blocks of proteins.
A)DNA and RNA
B)Amino acids
C)Formaldehyde molecules
D)Cyanide molecules
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