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Evolution Ch.14

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

 1. 

Which group of organisms is believed to have been the earliest to evolve?
a.
mammals
c.
aquatic dinosaurs
b.
cyanobacteria
d.
land plants
 

 2. 

Which event contributed most directly to the evidence of aerobic organisms?
a.
an increase in the concentration of methane in the ancient atmosphere
b.
a decrease in the sun's light intensity
c.
the presence of organisms able to carry on photosynthesis
d.
an increase in the number of organisms carrying on fermentation
 

 3. 

The Geologic Time Scale begins at the formation of Earth approximately _____ years ago.
a.
4.6 billion
c.
4.6 thousand
b.
4.6 million
d.
46 million
 

 4. 

A clear fish imprint in a rock indicates that the rock is probably _____.
a.
metamorphic
c.
volcanic
b.
sedimentary
d.
igneous
 

 5. 

Which of the following fossils are not found in sedimentary rock?
a.
frozen mammoths
c.
imprints
b.
amber
d.
petrified wood
 

 6. 

The primitive Earth atmosphere is hypothesized to have consisted mostly of _____.
a.
hydrogen, methane, ammonia, and water vapor
b.
oxygen, nitrogen, and water vapor
c.
amino acids, ATP, carbohydrates, and oxygen
d.
none of these
 

 7. 

Before biogenesis became an accepted cornerstone of biology, it was widely accepted that _____.
a.
flies could be produced only from other flies
b.
living things could arise spontaneously from other living things
c.
maggots were the immature offspring of flies
d.
Francesco Redi and Louis Pasteur would be unable to test the current beliefs
 

 8. 

Humans are thought to have evolved during the _____ Era.
a.
Mesozoic
c.
Paleozoic
b.
Precambrian
d.
Cenozoic
 

 9. 

Which of the following statements are true about fossils?
a.
There are many different ways that fossils can be formed.
b.
Fossil insects that were trapped in ice or hardened into amber.
c.
Fossils are usually found in sedimentary rock layers.
d.
all of these
 

 10. 

Urey and Miller subjected water, ammonia, methane, and hydrogen to heating and cooling cycles and jolts of electricity in an attempt to _____.
a.
determine how the dinosaurs became extinct
b.
form complex organic compounds
c.
determine the age of microfossils
d.
find out how ozone forms in the atmosphere
 



 
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