IBDP Biology Question Analysis Topic: Biology - Birds
Exam Question:
Which of the following characters represents flight adaptation of birds?
A. Bones are pneumatic.
B. Sternum has a keel for attachment of flight muscles.
C. Forelimbs are modified into wings.
D. All of the above.
Answer:
For IBDP Biology, you should know:
A strong yet lightweight scaffolding made of typically specialized bones supports the bodies of birds. This is made feasible through the fusion and removal of a few specific bones, along with the hollowing of the other bones; these are known as pneumatic bones.
1. To help with this, several vertebrae and pelvic bones have been fused.
2. Pneumatic bones are lighter than most solid bones because they contain air gaps. Only the skull contains them.
3. The sternum, sometimes referred to as the breastbone, is one of the most significant bones in a bird's skeleton and forms a significant portion of the girdle, which is essential for the attachment of the flying muscles.
4. Birds' forelimbs are converted into wings, a characteristic of avians that allows them to fly. These are only a few of the numerous evolutionary characteristics that birds have that make flying easier.
As such, the answer is D; all of the above.
Work hard for your IBDP Biology examination!
End of analysis. Great!
