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Home Q & A Board Biology-Related Homework Help General Biology
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cb2015 cb2015
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6 years ago
Fish can control buoyancy by:
  a. holding air in their lungs.
  b. expelling air from their lungs.
  c. swift movements of their opercula.
  d. adjusting the amount of gas in their swim bladders.
  e. inflating the chambers of their tracheae.

Question 2

_____ have the most efficient respiratory system of any living vertebrate.
  a. Amphibians
  b. Birds
  c. Mammals
  d. Fish
  e. Nonavian reptiles
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syd_dawssyd_daws
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6 years ago
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cb2015 Author
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6 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
zsc999
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Yesterday
You make an excellent tutor!
7.prime7105
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2 hours ago
This site is awesome
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