Sa3lme3rthiski Sa3lme3rthiski
  • 17-02-2016
  • Biology
contestada

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

Respuesta :

zerofrancisco zerofrancisco
  • 17-02-2016
The correct answer is spiracles.
Answer Link

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