obse2sarivbabyjenn obse2sarivbabyjenn

30-10-2016
Biology

contestada

When fish breathe, their gills exchange oxygen and ___________.
a. carbon dioxide
c. carbon monoxide
b. nitrogen
d. only oxygen is exchanged?

Respuesta :

barrvince barrvince

01-11-2016

C. carbon monoxide is the answer

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