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High School Biology: From Fish to Birds - Birds (Fill in the blank)
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High School Biology: From Fish to Birds - Birds (Fill in the blank)
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8 Questions

1. Raptors such as hawks and owls are ____________, they eat mammals and other birds.

2. ____________ most numerous vertebrates on Earth.

3. ____________ are modified front legs.

4. Birds have a sac-like structure called a crop where they store ____________.

5. Birds are ____________, and can maintain their body temperature using their metabolism.

6. Penguins are flightless birds adapted for ____________.

7. Courtship in birds can involve ____________ and dancing.

8. Birds have light-weight ____________ that are filled with air.

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