Multiple Choice
Which one of the following is not an adaptation shown by modern birds?
A) a respiratory system that allows all of the air to pass through the lungs in one direction
B) complete division of the heart into right and left halves
C) endothermy
D) wings and a long feathered tail
E) modified beaks and feet to support feeding behavior
Correct Answer:

Verified
Correct Answer:
Verified
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