The External Gills of an Adult Axolotl Are Not as Efficient

question 30

Multiple Choice

The external gills of an adult axolotl are not as efficient as fish gills because________.

• A)water flows over the axolotl gills at many different angles
• B)blood flows though the axolotl gills more slowly than through fish gills
• C)axolotl gills are not highly branched
• D)axolotl gills are covered by thick layers of cells
• E)axolotls are slow swimmers and all fish swim fast to ventilate their gills

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