February 28, 2017

Homework Help: Biology

Posted by mysterychicken on Thursday, March 18, 2010 at 4:41pm.

20. When the blood enters the gill filaments in a fish, its carbon dioxide content is ________ and oxygen content is _____
a. low;high
b. low;low
c. high;high
d. high;low
D? I'm not sure about this question...


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