Section #: 22.4
Early Life on Earth
Practice Test
1.
Which type of cell shown in the figure existed first?
SC.D.1.4.3
a.
it is impossible to tell
b.
A
c.
both came into existence at the same time
d.
B
Hint
2.
The energy and nutrients necessary for the origin of life can be found near __________.
SC.D.1.4.3
a.
transform faults
b.
hydrothermal vents
c.
magma chambers
d.
trenches
Hint
3.
What did organisms of Earth's first 4 billion years have in common?
SC.D.1.4.3
a.
They were photosynthetic.
b.
They were multi-celled organisms.
c.
They breathed oxygen.
d.
They were single-celled organisms.
Hint
4.
What event caused the extinction of acritarchs near the end of the Proterozoic?
SC.D.1.4.3
a.
outgassing
b.
global warming
c.
the Varagnian glaciation
d.
formation of ozone
Hint
5.
Fossils of __________ from late Proterozoic rocks are found in all parts of the world.
SC.D.1.4.3
a.
the Ediacaran fauna
b.
the Burgess Shale fauna
c.
trilobites
d.
corals
Hint
6.
__________ are the building blocks of proteins.
SC.F.1.4.1
a.
Formaldehyde molecules
b.
DNA and RNA
c.
Cyanide molecules
d.
Amino acids
Hint
7.
What were the type of life-forms that existed before the Proterozoic?
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a.
prokaryotes
b.
fungi
c.
algae
d.
eukaryotes
Hint
