Unit 4 Review: Question Preview (ID: 29684)

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What process is most responsible for the extinction of most species of plants and animals that have lived on Earth?
a) gene mutation
b) environmental changes
c) selective breeding
d) decrease in reproduction

Which would indicate that a series of fossils represent the evolution of the horse?
a) All of the fossils were found in the same layers of rocks as horse fossils. 

b) All of the fossils are completely identical to horse bones. 

c) All of the fossils show similar structures to that of the modern horse. 

d) All of the fossils were located in the same place on Earth as horses. 

A strawberry farmer finds that, after a hard freeze, some of his strawberries are 
still alive. Which best explains why these strawberries were able to survive?
a) They have larger leaves to protect the fruit than the other strawberries. 

b) They have different genetic variations that cause them to be more resistant to cold temperatures. 

c) They are able to reproduce more quickly than the other strawberries. 

d) The color of the strawberries is darker, and they maintain their temperature better than other strawberries. 

Scientists think that dolphins and whales may have evolved from a common ancestor. What evidence supports this hypothesis?
a) They swim the same way.
b) They eat the same food.
c) They live in the same area of the ocean.
d) They have similar anatomies.

In the winter, the fur of the arctic fox is white. In summer, the fur darkens to a reddish brown. What most likely causes the fur of the fox to change color?
a) the amount of sunlight present 

b) the fox’s habitat 

c) the fox’s genes 

d) the fox’s age 

Which would best allow a species to survive environmental changes?
a) similar physical features 

b) low mutation rate 

c) small population 

d) genetic diversity 

What do transitional fossils best support?
a) the Theory of Biological Evolution
b) the Law of Superposition
c) the Theory of Geological Evolution
d) the Theory of Continental Drift

Tigers and household cats are members of the same family; however, their sizes are vastly different. What is the cause of this difference?
a) biochemical makeup 

b) behavioral makeup 

c) genetics 

d) habitat size

Which best describes the similar function of wings in birds and butterflies?
a) embryological structures
b) homologous structures
c) analogous structures
d) vestigial structures

Which most likely led to major changes in biological evolution?
a) separation of landmasses
b) short time periods of drought conditions
c) long time periods with no volcanic eruptions
d) migration of animals from one area to another

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