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.

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