Name ______________________________ Class ___________________ Date __________________
Skills Worksheet – http://nemsgoldeneagles.wikispaces.com
Chapter 4, section 2 Review
How Do Population Changes Happen?
USING KEY TERMS
1. In your own words, write a definition for the term trait.
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UNDERSTANDING KEY IDEAS
2. Describe Darwin’s observations about the species on the Galápagos Islands.
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3. Describe the four parts of Darwin’s theory of natural selection.
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4. What knowledge that modern scientists now use to explain how variation
occurs did Darwin lack?
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_____ 5. The beak of the large ground finch of the Galápagos Islands is adapted
to the way that the finch usually gets food. The beak is wide and
strong. Which of the following is MOST likely the finch’s main food
source?
A. small insects
B. big, hard seeds
C. juicy cactus parts
D. small freshwater fish
Mr. Hall’s Science Class
1
Biodiversity & Natural Selection
Name ______________________________ Class ___________________ Date __________________
Section Review continued
MATH SKILLS
6. In a sample of 80 beetles, 50 beetles had 4 spots each, and the rest had 6 spots
each. What was the average number of spots per beetle? Show your work
below.
CRITICAL THINKING
7. Identifying Relationships Summarize Malthus’s ideas about population. How
did Darwin relate Malthus’s ideas to the inheritance of survival
characteristics?
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8. Predicting Consequences Suppose that an island in the Pacific Ocean was
recently formed by a volcano. Over the next million years, how might species
on this island adapt?
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9. Making Hypotheses The beak of the large ground finch of the Galápagos
Islands is wide and strong, an adaptation to the finch’s usual diet of big, hard
seeds. How might this adaptation affect a finch’s ability to survive if the
finch’s main source of food were to die out?
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Mr. Hall’s Science Class
2
Biodiversity & Natural Selection
Name ______________________________ Class ___________________ Date __________________
Skills Worksheet http://nemsgoldeneagles.wikispaces.com
Chapter 4, section 3 Review
Natural Selection in Action
USING KEY TERMS
1. In your own words, write a definition for the term generation time.
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UNDERSTANDING KEY IDEAS
2. How is insecticide resistance a survival characteristic?
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3. Illustrate how new species of Galápagos finches may have formed.
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_____ 4. In a population of frogs, male frogs croak to scare off predators.
However, a few male frogs cannot croak as loudly as other male frogs
do. Why are the louder male frogs more likely to survive?
A. They will attract more mates.
B. They will catch more insects.
C. They will jump higher.
D. They will escape predators.
MATH SKILLS
5. A rusty grain beetle has a generation time of 30 days. How many generations
of beetles can be produced in 5 years? Show your work below.
Mr. Hall’s Science Class
3
Biodiversity & Natural Selection
Name ______________________________ Class ___________________ Date __________________
Section Review continued
CRITICAL THINKING
6. Making Comparisons Suggest an organism other than an insect that might
develop an adaptation to human activities.
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7. Predicting Consequences How might the use of a newly developed insecticide
technology impact society?
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Mr. Hall’s Science Class
4
Biodiversity & Natural Selection