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

bronchi
alveoli
spiracles
trachea

User Jozo
by
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1 Answer

2 votes
The correct answer is spiracles.
User CruorVult
by
8.6k points
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