r2b2ndjyq5
r2b2ndjyq5 r2b2ndjyq5
  • 12-08-2021
  • Biology
contestada

What maintains the concentration gradient across
respiration membranes?
A. Ventilation
B. Cartilage
C. Spiracles
D. Cohesion

Respuesta :

kierrawillis2323 kierrawillis2323
  • 12-08-2021
spiracles which is c
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