Multiple Choice
Which of the following is the main reason that makes Bar-Headed Geese unusual among birds?
A) They often fly just above 7000 m, where the air contains only 40% of the oxygen.
B) They often fly just above 5000 m, where the air contains only 40% of the oxygen.
C) They often fly just above 7000 m, where the air contains only 30% of the oxygen.
D) They often fly just above 5000 m, where the air contains only 30% of the oxygen.
Correct Answer:
Verified
Correct Answer:
Verified
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