a. filtrate processing in the loop of Henle
b. exchange of gas in the gills of fish
c. exchange of gas in the alveoli (air sac in the lungs) of humans
d. blood circulation contained by the feet of penguins
e. blood and gas exchange surrounded by nasal passages
i know that the answer isn't b or d.
I say-so E, only because I proved A be an example and so was C.
I'd progress with e too
More questions and answers...