Question

Bird vertebrae are

• A. acoelous
• B. heterocoelous
• C. amphicoelous
• D. procoelous.

Answer 1

The Correct Option is B

The question asks about the type of vertebrae found in birds. Let's explore the different types of vertebrae mentioned in the options and identify which one is characteristic of birds:

1. Acoelous: These vertebrae have vertebral bodies that are flat on both ends. This type is typically found in mammals.
2. Heterocoelous: This type of vertebrae is saddle-shaped at both ends, allowing for increased flexibility and range of motion. It is characteristic of birds, especially in their cervical (neck) region, facilitating their quick and varied head movements.
3. Amphicoelous: Vertebrae that are concave on both ends. This type is commonly seen in fish.
4. Procoelous: Vertebrae with a concave anterior (front) end and a convex posterior (back) end. This type is found in reptiles.

Conclusion: The correct answer to the question, "Bird vertebrae are," is heterocoelous, as birds have this type of vertebrae which allows for flexible and diverse neck movements necessary for their survival and adaptation.