SKILL PRACTICE Read each question. Fill in the bubble next to the correct answer. 1. In the wild, male prairie voles are different from meadow voles because the prairie voles . A
are mostly solitary
B
leave their offspring alone
C
care for their offspring
D
have many mates
2. What happened when scientists blocked vasopressin from prairie voles’ brains? A
They stopped forming strong attachments to
one female.
B
They chose to stay with just one mate.
C
They took special care of their offspring.
D
They chose to live in extended families that
included other males.
3. When scientists increased the amount of vasopressin reaching meadow voles’ brains, the meadow voles . A
chose to live alone
B
began to stay with one mate
C
stopped having offspring
D
decided to mate with prairie voles
4. How are meadow voles similar to most other wildlife? A
The females leave their young to fend for
themselves.
B
They protect their mates from other voles.
C
The males have many partners throughout
their lives.
D
They stay with one partner for a long time.
STRATEGY PRACTICE How are the paragraphs and the passage organized? Explain your answer. Compare and Contrast 3458.indb 96
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