Multiple Choice
The external gills of an adult axolotl are not as efficient as fish gills because___________.
A) axolotls are slow swimmers and all fish swim fast to ventilate their gills
B) blood flows though the axolotl gills more slowly than through fish gills
C) axolotl gills are not highly branched
D) water flows over the axolotl gills at many different angles
E) axolotl gills are covered by thick layers of cells
Correct Answer:
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