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Sa3lme3rthiski Sa3lme3rthiski
  • 17-02-2016
  • Biology
Answered

Most insects have small holes in the exoskeleton called _____, which open and close to regulate air flow.

bronchi

alveoli

spiracles

trachea

Verified Answer :

zerofrancisco zerofrancisco
  • 17-02-2016

The correct answer is spiracles.

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