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Type: Multiple-Choice
Category: Zoology
Level: College
Created: 2 weeks ago

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College Zoology

Air-breathing insects carry out gas exchange                                                              .
  1. in their specialized internal gills.
  2. across all parts of their thin exoskeleton.
  3. across the finest branches of the trachea and cell membranes.
  4. in the alveoli of their lungs.
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