Unit 5 - Vocabulary

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Across
  1. 2. Insects' wing structures _________ them when they fly.
  2. 3. Many species developed the ability to _________.
  3. 5. Being able to walk on two legs is one _____ of humans.
  4. 7. Bats are the only mammals capable of _________ flight.
  5. 10. Their hollow bones and light bodies _______ birds to fly.
  6. 11. Bats are the only mammals with flight __________.
  7. 14. The _______ of the largest pterosaur was over ten meters.
  8. 15. Millions of years ago, all life was _________ to land and water.
Down
  1. 1. _______ developed first in insects.
  2. 2. Both birds and bats are ________ fliers.
  3. 4. All species _________ over time.
  4. 6. ________ insects were the first animals to fly.
  5. 8. Birds have light, ___________ bones that allow them to fly.
  6. 9. Large birds can _______ when they spread their wings.
  7. 10. ______ is the process through which someone gets used to a certain environment.
  8. 12. Animals _______ their wings to fly.
  9. 13. An animal's _________ can affect how it flies.