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MohamadMatar MohamadMatar
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6 years ago
Respiration in birds differs from mammals in that birds have
 a. lungs used for gas exchange only.
  b. a comparatively higher tracheal volume.
  c. air capillaries.
  d. air sacs for ventilation.
  e. all of these.
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miguelhdz8miguelhdz8
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6 years ago
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MohamadMatar Author
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6 years ago
Smart ... Thanks!
brina10
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Yesterday
Just got PERFECT on my quiz
brina10
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2 hours ago
Good timing, thanks!
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