Name:     ID: 
 
Email: 

Bio I Ch. 17 Test B

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
Examples of fossils include preserved
a.
eggs.
c.
body parts.
b.
footprints.
d.
all of the above
 

 2. 
Most fossils form in
a.
rusty water.
c.
sedimentary rock.
b.
volcanic rocks.
d.
the sap of ancient trees.
 

 3. 
The length of time required for half of the radioactive atoms in a sample to decay is its
a.
half-life.
c.
radioactive date.
b.
relative date.
d.
period.
 

 4. 
To compare the relative ages of fossils, scientists sometimes use an easily recognized species called a(an)
a.
carbon fossil.
c.
index fossil.
b.
radioactive fossil.
d.
sedimentary fossil.
 

 5. 
Earth’s most recent era is the
a.
Paleozoic.
c.
Cenozoic.
b.
Mesozoic.
d.
Precambrian.
 

 6. 
Why did oceans not exist on Earth nearly 4 billion years ago?
a.
No water molecules were present.
b.
Water remained a gas because Earth was very hot.
c.
Water existed as ice because Earth was very cold.
d.
There was no oxygen gas in the atmosphere.
 

 7. 
Early in Earth’s history, while the planet was in a melted state, the most dense elements formed Earth’s
a.
core.
c.
crust.
b.
seas.
d.
atmosphere.
 

 8. 
In addition to hydrogen, two of the gases used in Miller and Urey’s experiment were
a.
nitrogen and carbon monoxide.
b.
hydrogen cyanide and oxygen.
c.
methane and ammonia.
d.
carbon dioxide and hydrogen sulfide.
 

 9. 
What do proteinoid microspheres have in common with cells?
a.
They can store and release energy.
c.
They contain RNA.
b.
They contain DNA.
d.
They are communities of organisms.
 

 10. 
When oxygen was first released in the early seas, it combined with iron to form
a.
RNA.
c.
proteins.
b.
DNA.
d.
rust.
 

 11. 
The first organisms on Earth were most like today’s
a.
bacteria.
c.
multicellular organisms.
b.
eukaryotes.
d.
DNA molecules.
 

 12. 
A very large mass extinction in which trilobites and amphibians disappeared occurred at the end of the
a.
Precambrian Era.
c.
Paleozoic Era.
b.
Cambrian Period.
d.
Quaternary Period.
 

 13. 
During the Jurassic and Cretaceous periods, the dominant land animals were
a.
amphibians.
c.
grazing mammals.
b.
dinosaurs.
d.
human ancestors.
 

 14. 
A single species that has evolved into several different forms that live in different ways has undergone
a.
adaptive radiation.
c.
punctuated equilibrium.
b.
coevolution.
d.
mass extinction.
 

 15. 
Sharks, dolphins, and penguins all have streamlined bodies and appendages that enable them to move through water. These similarities are the result of
a.
coevolution.
c.
asexual reproduction.
b.
convergent evolution.
d.
adaptive radiation.
 

Completion
Complete each statement. Word bank.
periods,     coevolution,     amino acids,     endosymbiotic,     fossils
 

 16. 
The ____________________ record provides evidence about the history of life on Earth.
 

 

 17. 
After Precambrian Time, the main divisions of the geologic time scale are eras and ____________________.
 

 

 18. 
In Miller and Urey’s experiment, several ____________________, which are the building blocks of proteins, began to accumulate.
 

 

 19. 
The ____________________ theory proposes that eukaryotic cells arose from living communities of several prokaryotic organisms.
 

 

 20. 
____________________ is the process by which two species evolve in response to changes in each other over time.
 

 



 
         Start Over