Solved

Some Bird Bones Are Hollow Rather Than Honeycombed

Question 98

Multiple Choice

Some bird bones are hollow rather than honeycombed. The hollow bones mostly contain air sacs. The replacement of bone marrow with air sacs is properly understood as an adaptation to


A) reduce the weight of the bird.
B) facilitate flight.
C) eliminate the functions that marrow performs.
D) All three of the options listed are correct.
E) Only two of the options listed are correct.

Correct Answer:

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