WS

1. Name____________________________ Class__________________ Date __________
Galápagos Island Finches
Finches in the Galápagos Islands have beaks adapted to eat the
foods available in the birds’ habitats.
Use the words below to match each finch with the food it is adapted to eat.
The first one is done for you.
insects that live inside dead wood
large, thick-shelled seeds
small seeds
Use the table to answer the questions.
1. How does the large crushing beak help the fourth finch survive?
2. Circle the finch that would be least likely to survive if the insect
population decreased.
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152
Name____________________________ Class__________________ Date __________Name____________________________ Class__________________ Date __________
Galapagos Islands Finches`
Shape of Head
and Beak
Main Food
Feeding
Adaptation
Habitat
fruits
Parrotlike
beak
Trees
Uses cactus
spines
Trees
Pointed
crushing beak
Ground
Large
crushing beak
Ground

2. Name____________________________ Class__________________ Date __________
© Pearson Education, Inc., publishing as Pearson Prentice Hall.
153
Name____________________________ Class__________________ Date __________
Speciation
Use the words below to identify each process that leads to speciation. One
row has been completed for you.
changes in the gene pool geographic isolation
ecological competition reproductive isolation
Process How It Leads to Speciation
founders arrive A population arrives in a new place.
Populations are separated by a geographic
barrier and do not share a gene pool.
Populations evolve new traits in response to
natural selection in their environments.
Populations reproduce only within their
own group, leading to the development of
new species.
Species evolve in a way that reduces
competition between them.
Use the table to answer the question.
1. Do populations that are geographically isolated from one
another share a gene pool? Explain.