BSCS Biology: A Molecular Approach

Chapter 17: The Origin of Life

The Record of the Rocks

1.
The fossilized stromatolites shown here are significant because they were recently found to contain ____, or fossil microorganisms.
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A)microfossils
B)methanogens
C)hydrothermals
D)bacteria
2.
____ are anaerobic bacteria that obtain energy by using carbon dioxide to oxidize hydrogen.
A)hydrothermals
B)microfossils
C)methanogens
D)stomatolites
3.
What do the Great Salt Lake in Utah, acidic mining wastes, and hydrothermal volcanic vents deep in the ocean have in common?
A)They are all extremely salty.
B)They all provide a home for methanogens and similar anaerobic bacteria.
C)They all form stromatolites.
D)They are all superheated locations.
4.
____ cells contain membrane-enclosed organelles such as a nucleus, mitochondria, and chloroplasts.
A)eukaryotic
B)prokaryotic
C)membranous
D)organized
5.
Which of the following best summarizes Lynn Margulis's endosymbiont hypothesis about the origin of eukaryotes?
A)They formed from internal cell mutation.
B)Their internal structures developed from waste materials that failed to leave the cell.
C)They formed from prokaryotic division.
D)Their internal structures were once smaller prokaryotes that were absorbed.
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