Question

Which one of the following organisms bears hollow and pneumatic long bones

• A. Ornithorhynchus
• B. Neophron
• C. Hemidactylus
• D. Macropus

Answer 1

The Correct Option is B

To identify the organism that bears hollow and pneumatic long bones, we need to understand the unique skeletal features present in the various options provided.

The hollow and pneumatic bones are typically a feature found in birds. These bones help to reduce the body weight of birds without sacrificing strength, which is essential for efficient flight. Now, let's analyze each option:

1. Ornithorhynchus: Commonly known as the platypus, this mammal has bones similar to typical mammalian bones, which are not pneumatic.
2. Neophron: This refers to a genus of bird, specifically the Egyptian vulture. As a bird, it possesses pneumatic bones that are adapted for flight.
3. Hemidactylus: This is a genus of geckos. Reptiles do not have pneumatic bones as they are not adapted for flight.
4. Macropus: This refers to kangaroos and similar marsupials, which do not have hollow or pneumatic bones.

Conclusion: Considering the adaptations necessary for flight and the skeletal structure of the given organisms, the Egyptian vulture (Neophron) is the only one with hollow, pneumatic bones. Thus, the correct answer is Neophron.